WebDAV Component

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The WebDAV Component implements an easy-to-use interface to the Web Distributed Authoring and Versioning protocol (WebDAV).

Syntax

TipwWebDAV

Remarks

The WebDAV Component supports both plaintext and SSL/TLS connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.

The component allows remote management of resource properties and properties, including creation, deletion, listing, copying, and moving. Resource locking is also supported.

The ListDirectory and FindProperties methods will list the properties of a resource properties or resource, and a DirList or ResourceProperties event will be fired for each matching resource.

Depth is used to determine which resources or properties are retrieved from the server. A depth of ResourceOnly will return only the resource associated with ResourceURI, or its properties. A depth of Infinity will return all resources contained within hierarchy, or their collective properties.

Note: Some servers (such as IIS 7.5) may not support a depth of Infinity by default and may return a HTTP 403 Forbidden response.

A number of operations can be performed on resources by using the various methods of the component. Please refer to the individual methods for more information.

WebDAV allows non-standard properties to be specified through XML namespaces.

The namespaces are provided in the Namespaces properties, which is filled automatically when retrieving DAV responses, but must be filled manually when requesting non-standard properties.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.

Accept Property (WebDAV Component)

This property includes a list of acceptable MIME types for the request.

Syntax

property Accept: String read get_Accept write set_Accept;

Default Value

''

Remarks

If this property contains a nonempty string, an HTTP Accept header is added to the request.

The Accept header is used for content negotiation. It provides the server with a comma-separated list of MIME types that are acceptable for its response.

Authorization Property (WebDAV Component)

This property includes the Authorization string to be sent to the server.

Syntax

property Authorization: String read get_Authorization write set_Authorization;

Default Value

''

Remarks

If the Authorization property contains a nonempty string, an Authorization HTTP request header is added to the request. This header conveys Authorization information to the server.

A common use for this property is to specify OAuth authorization string.

This property is provided so that the HTTP component can be extended with other security schemes in addition to the authorization schemes already implemented by the component.

The AuthScheme property defines the authentication scheme used. In the case of HTTP Basic Authentication (default), every time User and Password are set, they are Base64 encoded, and the result is put in the Authorization property in the form 'Basic [encoded-user-password]'.

AuthScheme Property (WebDAV Component)

The authentication scheme to use when server authentication is required.

Syntax

property AuthScheme: TipwTHTTPAuthSchemes read get_AuthScheme write set_AuthScheme;

TipwTHTTPAuthSchemes = (
  authBasic,
  authDigest,
  authProprietary,
  authNone,
  authNtlm,
  authNegotiate,
  authOAuth
);

Default Value

authBasic

Remarks

This property will tell the component which type of authorization to perform when the User and Password properties are set.

This property should be set to authNone (3) when no authentication is to be performed.

By default, this property is authBasic (0), and if the User and Password properties are set, the component will attempt HTTP Basic Authentication. If AuthScheme is set to authDigest (1), authNtlm (4), or authNegotiate (5), then Digest, NTLM, or Windows Negotiate (Kerberos) authentication will be attempted instead.

If AuthScheme is set to authProprietary (2), then the authorization token must be supplied through the Authorization property.

If AuthScheme is set to authOAuth (6), then the authorization string must be supplied through the Authorization property.

Note: If you set the Authorization property and AuthScheme is not authProprietary or authOAuth, then the AuthScheme will be set automatically to authProprietary (2) by the component.

For security, changing the value of this property will cause the component to clear the values of User, Password, and Authorization.

Connected Property (WebDAV Component)

This shows whether the component is connected.

Syntax

property Connected: Boolean read get_Connected write set_Connected;

Default Value

false

Remarks

This property is used to determine whether or not the component is connected to the remote host.

Note: It is recommended to use the Connect or Disconnect method instead of setting this property.

This property is not available at design time.

Cookies Property (WebDAV Component)

This property includes a collection of cookies.

Syntax

property Cookies: TipwHTTPCookieList read get_Cookies write set_Cookies;

Remarks

This property contains a collection of cookies. To add cookies to outgoing HTTP requests, add cookies (of type HTTPCookie) to this collection.

To see cookies that are set by the server, use the SetCookie event, which displays the cookies and their properties as set by the server. Those cookies also are added to Cookies.

MaxHTTPCookies can be used to control the maximum number of cookies saved.

This property is not available at design time.

Depth Property (WebDAV Component)

The depth associated with the current operation.

Syntax

property Depth: TipwTDepths read get_Depth write set_Depth;

TipwTDepths = (
  dpUnspecified,
  dpResourceOnly,
  dpImmediateChildren,
  dpInfinity
);

Default Value

dpUnspecified

Remarks

When performing certain operations on resource collections, the component will use Depth to instruct the server on how deep to operate within the collection. Depth is an enumerated type with the following possible values:

Depth is used when performing the following operations: LockResource, MoveResource CopyResource, FindProperties, PatchProperties, and ListDirectory.

Firewall Property (WebDAV Component)

A set of properties related to firewall access.

Syntax

property Firewall: TipwFirewall read get_Firewall write set_Firewall;

Remarks

This is a Firewall-type property, which contains fields describing the firewall through which the component will attempt to connect.

FollowRedirects Property (WebDAV Component)

This property determines what happens when the server issues a redirect.

Syntax

property FollowRedirects: TipwTFollowRedirects read get_FollowRedirects write set_FollowRedirects;

TipwTFollowRedirects = (
  frNever,
  frAlways,
  frSameScheme
);

Default Value

frNever

Remarks

This property determines what happens when the server issues a redirect. Normally, the component returns an error if the server responds with an "Object Moved" message. If this property is set to frAlways (1), the new URL for the object is retrieved automatically every time.

If this property is set to frSameScheme (2), the new URL is retrieved automatically only if the URLScheme is the same; otherwise, the component raises an exception.

Note: Following the HTTP specification, unless this property is set to frAlways (1), automatic redirects will be performed only for GET or HEAD requests. Other methods potentially could change the conditions of the initial request and create security vulnerabilities.

Furthermore, if either the new URL server or port are different from the existing one, User and Password are also reset to empty. If, however, this property is set to frAlways (1), the same credentials are used to connect to the new server.

A Redirect event is fired for every URL the product is redirected to. In the case of automatic redirections, the Redirect event is a good place to set properties related to the new connection (e.g., new authentication parameters).

The default value is frNever (0). In this case, redirects are never followed, and the component raises an exception instead.

Idle Property (WebDAV Component)

The current status of the component.

Syntax

property Idle: Boolean read get_Idle;

Default Value

true

Remarks

Idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

LocalFile Property (WebDAV Component)

The path to a local file used for DAV operations.

Syntax

property LocalFile: String read get_LocalFile write set_LocalFile;

Default Value

''

Remarks

After a GetResource operation, LocalFile will contain the contents of the resource.

For a PutResource operation, LocalFile contains the data that will be uploaded to the server.

If LocalFile is empty then the received data is provided through the Transfer event.

LocalHost Property (WebDAV Component)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

property LocalHost: String read get_LocalHost write set_LocalHost;

Default Value

''

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.

If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

LockOwner Property (WebDAV Component)

The principle that owns the current resource lock.

Syntax

property LockOwner: String read get_LockOwner write set_LockOwner;

Default Value

''

Remarks

Before a call to the LockResource method, LockOwner may be set to the name of a principle or group of principles that will own the lock. If no owner is specified, the server will automatically associate the lock with the requesting principle. After a successful LockResource operation, the component will set the LockOwner property to the correct value returned in the server's response.

LockScope Property (WebDAV Component)

The scope of the current resource lock.

Syntax

property LockScope: String read get_LockScope write set_LockScope;

Default Value

''

Remarks

Before a call to the LockResource method, LockScope may be set to the type of scope needed for the lock. Currently the component will only allow two types of scopes to be requested:

If no scope is specified, the protocol default scope, "exclusive", will be requested. After a successful LockResource operation, the component will set the LockScope property to the correct value returned in the server's response.

LockTimeout Property (WebDAV Component)

The time to live for the current resource lock.

Syntax

property LockTimeout: Integer read get_LockTimeout write set_LockTimeout;

Default Value

0

Remarks

Before a call to the LockResource method, LockTimeout may be set to a specific amount of time needed for the locked operation to take place. The timeout is used to determine how long the lock may exist before the server automatically unlocks the resource URI. If Timeout of 0 is specified, the server will use a default timeout. After a successful LockResource operation, the component will set the LockTimeout property to the correct value returned in the server's response.

LockTokens Property (WebDAV Component)

The lock string to be used when submitting operations on a locked resource.

Syntax

property LockTokens: String read get_LockTokens write set_LockTokens;

Default Value

''

Remarks

Before a call to the LockResource method, LockTokens may be set to the tokens returned by a previous lock operation. This is useful when renewing a timeout. The server will respond with a new timeout value, which will be stored in LockTimeout. If the lock request is not a lock refresh, LockTokens must be empty, and will be parsed out of the server response after a successful call to the LockResource method.

LockType Property (WebDAV Component)

The type of the current resource lock.

Syntax

property LockType: String read get_LockType write set_LockType;

Default Value

'write'

Remarks

Before a call to the LockResource method, LockType may be set to the type of lock being requested. Currently, the component only supports requesting locks of type "write", although the protocol defines an optional "read" lock. After a successful LockResource operation, the component will set the LockType property to the correct value returned in the server's response.

Namespaces Property (WebDAV Component)

Collection of namespaces in the current stack.

Syntax

property Namespaces: TipwXMLNamespaceList read get_Namespaces write set_Namespaces;

Remarks

WebDAV allows non-standard properties to be specified through XML namespaces.

The collection is filled automatically when retrieving DAV responses, but must be filled manually when requesting non-standard properties.

If the DAV URI is not found in the namespaces collection, it will be added as the default namespace when generating a request. The DAV namespace URI is "DAV:".

This property is not available at design time.

OtherHeaders Property (WebDAV Component)

This property includes other headers as determined by the user (optional).

Syntax

property OtherHeaders: String read get_OtherHeaders write set_OtherHeaders;

Default Value

''

Remarks

This property can be set to a string of headers to be appended to the HTTP request headers created from other properties like ContentType and From.

The headers must follow the format Header: Value as described in the HTTP specifications. Header lines should be separated by CRLF ('#13#10') .

Use this property with caution. If this property contains invalid headers, HTTP requests may fail.

This property is useful for extending the functionality of the component beyond what is provided.

This property is not available at design time.

ParsedHeaders Property (WebDAV Component)

This property includes a collection of headers returned from the last request.

Syntax

property ParsedHeaders: TipwHeaderList read get_ParsedHeaders;

Remarks

This property contains a collection of headers returned from the last request. Whenever headers are returned from the server, the headers are parsed into a collection of headers. Each Header in this collection contains information describing that header.

MaxHeaders can be used to control the maximum number of headers saved.

This property is read-only and not available at design time.

Password Property (WebDAV Component)

This property includes a password if authentication is to be used.

Syntax

property Password: String read get_Password write set_Password;

Default Value

''

Remarks

This property contains a password if authentication is to be used. If AuthScheme is set to HTTP Basic Authentication, the User and Password are Base64 encoded and the result is put in the Authorization configuration setting in the form 'Basic [encoded-user-password]'.

If AuthScheme is set to HTTP Digest Authentication, the User and Password properties are used to respond to the HTTP Digest Authentication challenge from the server.

If AuthScheme is set to NTLM, NTLM authentication will be attempted. If AuthScheme is set to NTLM and User and Password are empty, the component will attempt to authenticate using the current user's credentials.

Properties Property (WebDAV Component)

A collection of WebDAV properties.

Syntax

property Properties: TipwDAVPropertyList read get_Properties write set_Properties;

Remarks

The property names provided in Properties collection are used by the FindProperties and PatchProperties methods.

After a call to FindProperties, the Properties properties will contain the name, value and status of DAV property returned by the server. The contents of the properties changes for every matching resource (ResourceProperties event). After the call completes, the properties will contain the values of the last matching resource.

When a call is made to PatchProperties, the component will use the operations provided in the Properties collection to tell the server what to do with the properties under the following scheme:

Proxy Property (WebDAV Component)

A set of properties related to proxy access.

Syntax

property Proxy: TipwProxy read get_Proxy write set_Proxy;

Remarks

This property contains fields describing the proxy through which the component will attempt to connect.

Referer Property (WebDAV Component)

This property includes the referer URL/document (optional).

Syntax

property Referer: String read get_Referer write set_Referer;

Default Value

''

Remarks

If this property contains a nonempty string, a Referer HTTP request header is added to the request. The purpose of the header is to show the document referring the requested URL.

This property is not available at design time.

Resources Property (WebDAV Component)

Collection of resources resulting from the last directory listing.

Syntax

property Resources: TipwDAVResourceList read get_Resources;

Remarks

This property contains a list of resources listed by the server after a call to the ListDirectory method. To retrieve properties of a particular resource, please refer to the FindProperties method).

MaxResources can be used to control the number of resource listings saved.

This property is read-only.

SSLAcceptServerCertEncoded Property (WebDAV Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLAcceptServerCertEncoded: String read get_SSLAcceptServerCertEncoded write set_SSLAcceptServerCertEncoded;
property SSLAcceptServerCertEncodedB: TBytes read get_SSLAcceptServerCertEncodedB write set_SSLAcceptServerCertEncodedB;

Default Value

''

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

This property is not available at design time.

SSLCertEncoded Property (WebDAV Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLCertEncoded: String read get_SSLCertEncoded write set_SSLCertEncoded;
property SSLCertEncodedB: TBytes read get_SSLCertEncodedB write set_SSLCertEncodedB;

Default Value

''

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

This property is not available at design time.

SSLCertStore Property (WebDAV Component)

This is the name of the certificate store for the client certificate.

Syntax

property SSLCertStore: String read get_SSLCertStore write set_SSLCertStore;
property SSLCertStoreB: TBytes read get_SSLCertStoreB write set_SSLCertStoreB;

Default Value

'MY'

Remarks

This is the name of the certificate store for the client certificate.

The StoreType property denotes the type of the certificate store specified by Store. If the store is password protected, specify the password in StorePassword.

Store is used in conjunction with the Subject property to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

SSLCertStorePassword Property (WebDAV Component)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

property SSLCertStorePassword: String read get_SSLCertStorePassword write set_SSLCertStorePassword;

Default Value

''

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

SSLCertStoreType Property (WebDAV Component)

This is the type of certificate store for this certificate.

Syntax

property SSLCertStoreType: TipwCertStoreTypes read get_SSLCertStoreType write set_SSLCertStoreType;

TipwCertStoreTypes = (
  cstUser,
  cstMachine,
  cstPFXFile,
  cstPFXBlob,
  cstJKSFile,
  cstJKSBlob,
  cstPEMKeyFile,
  cstPEMKeyBlob,
  cstPublicKeyFile,
  cstPublicKeyBlob,
  cstSSHPublicKeyBlob,
  cstP7BFile,
  cstP7BBlob,
  cstSSHPublicKeyFile,
  cstPPKFile,
  cstPPKBlob,
  cstXMLFile,
  cstXMLBlob,
  cstJWKFile,
  cstJWKBlob,
  cstSecurityKey,
  cstBCFKSFile,
  cstBCFKSBlob,
  cstPKCS11,
  cstAuto
);

Default Value

cstUser

Remarks

This is the type of certificate store for this certificate.

The component supports both public and private keys in a variety of formats. When the cstAuto value is used, the component will automatically determine the type. This property can take one of the following values:

SSLCertSubject Property (WebDAV Component)

This is the subject of the certificate used for client authentication.

Syntax

property SSLCertSubject: String read get_SSLCertSubject write set_SSLCertSubject;

Default Value

''

Remarks

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

SSLProvider Property (WebDAV Component)

This specifies the SSL/TLS implementation to use.

Syntax

property SSLProvider: TipwTSSLProviders read get_SSLProvider write set_SSLProvider;

TipwTSSLProviders = (
  sslpAutomatic,
  sslpPlatform,
  sslpInternal
);

Default Value

sslpAutomatic

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform.

When Automatic is selected, on Windows the component will use the platform implementation. On Linux/macOS the component will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

SSLServerCertEncoded Property (WebDAV Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLServerCertEncoded: String read get_SSLServerCertEncoded;
property SSLServerCertEncodedB: TBytes read get_SSLServerCertEncodedB;

Default Value

''

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

This property is read-only and not available at design time.

StatusLine Property (WebDAV Component)

This property is the first line of the last server response.

Syntax

property StatusLine: String read get_StatusLine;

Default Value

''

Remarks

This property contains the first line of the last server response. This value can be used for diagnostic purposes. If an HTTP error is returned when calling a method of the component, the error string is the same as the StatusLine property.

The HTTP protocol specifies the structure of the StatusLine as follows: [HTTP version] [Result Code] [Description].

This property is read-only and not available at design time.

Timeout Property (WebDAV Component)

A timeout for the component.

Syntax

property Timeout: Integer read get_Timeout write set_Timeout;

Default Value

60

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.

The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the component raises an exception.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

TransferredData Property (WebDAV Component)

This property includes the contents of the last response from the server.

Syntax

property TransferredData: String read get_TransferredData;
property TransferredDataB: TBytes read get_TransferredDataB;

Default Value

''

Remarks

This property contains the contents of the last response from the server. If the LocalFile is empty, the data are accumulated in TransferredData and also can be received in the Transfer event. Otherwise, this property returns an empty string.

TransferredDataLimit controls the maximum amount of data accumulated in TransferredData (by default there is no limit).

This property is read-only and not available at design time.

TransferredDataLimit Property (WebDAV Component)

This property specifies the the maximum amount of data to be transferred.

Syntax

property TransferredDataLimit: Int64 read get_TransferredDataLimit write set_TransferredDataLimit;

Default Value

0

Remarks

This property contains the maximum amount of data to be transferred. The default value is 0, which will not impose any limits on the amount of data accumulated in the TransferredData property.

TransferredHeaders Property (WebDAV Component)

This property includes the full set of headers as received from the server.

Syntax

property TransferredHeaders: String read get_TransferredHeaders;

Default Value

''

Remarks

This property returns the complete set of raw headers as received from the server.

The Header event shows the individual headers as parsed by the component.

This property is read-only and not available at design time.

User Property (WebDAV Component)

This property includes a user name if authentication is to be used.

Syntax

property User: String read get_User write set_User;

Default Value

''

Remarks

This property contains a user name if authentication is to be used. If AuthScheme is set to HTTP Basic Authentication, The User and Password are Base64 encoded, and the result is put in the Authorization property in the form 'Basic [encoded-user-password]'.

If AuthScheme is set to HTTP Digest Authentication, the User and Password properties are used to respond to the HTTP Digest Authentication challenge from the server.

If AuthScheme is set to NTLM, NTLM authentication will be attempted. If AuthScheme is set to NTLM, and User and Password are empty, the component will attempt to authenticate using the current user's credentials.

AddCookie Method (WebDAV Component)

This method adds a cookie and the corresponding value to the outgoing request headers.

Syntax

procedure AddCookie(CookieName: String; CookieValue: String);

Remarks

This property adds a cookie and the corresponding value to the outgoing request headers. Please refer to the Cookies property for more information on cookies and how they are managed.

AddNamespace Method (WebDAV Component)

Adds a namespace to the Namespaces properties.

Syntax

procedure AddNamespace(Prefix: String; NamespaceURI: String);

Remarks

Prefix specifies the namespace prefix, and NamespaceURI specifies the namespace.

Config Method (WebDAV Component)

Sets or retrieves a configuration setting.

Syntax

function Config(ConfigurationString: String): String;

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

CopyResource Method (WebDAV Component)

Copy a resource to a new location.

Syntax

procedure CopyResource(SourceResourceURI: String; DestinationResourceURI: String);

Remarks

The CopyResource method will copy the resource indicated by SourceResourceURI to a new location under the resource indicated by DestinationResourceURI.

This method is associated with the Depth property. If Depth is set to "0", the component will copy only SourceResourceURI. If Depth is set to "infinity", the component will copy SourceResourceURI and its entire subtree to locations relative to it.

If the user has acquired a LockResource of infinite depth on either DestinationResourceURI or any collection it is under, SourceResourceURI will be added to that lock.

DeleteResource Method (WebDAV Component)

Delete a resource.

Syntax

procedure DeleteResource(ResourceURI: String);

Remarks

The resource or collection specified by ResourceURI is deleted. The DeleteResource method behaves independently of the Depth property. If ResourceURI denotes a non-collection resource, it is first removed from any collection which contains, then is removed from the server. If ResourceURI denotes a collection, the server behaves as if the command were issued with an infinite depth (ie, all internal member URIs denoting single resources or collections are deleted).

DoEvents Method (WebDAV Component)

Processes events from the internal message queue.

Syntax

procedure DoEvents();

Remarks

When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.

FindProperties Method (WebDAV Component)

Get resource property values from the server.

Syntax

procedure FindProperties(ResourceURI: String);

Remarks

FindProperties will request the values for the names at each item provided in the Properties properties. The matching URIs and property values will be returned through one or more ResourceProperties events (one for each matching resource).

If there are no Properties set, then the server will be asked for all the properties of the resource. The properties will be returned via one or more ResourceProperties events.

Depth is used to determine which resources or properties are retrieved from the server. A depth of ResourceOnly will return only the resource associated with ResourceURI, or its properties. A depth of Infinity will return all resources contained within hierarchy, or their collective properties.

Note: Some servers (such as IIS 7.5) may not support a depth of Infinity by default and may return a HTTP 403 Forbidden response.

FindPropertyNames Method (WebDAV Component)

Get resource property names from the server.

Syntax

procedure FindPropertyNames(ResourceURI: String);

Remarks

FindPropertyNames will request names of all the properties of ResourceURI. The matching URIs will be returned through one or more ResourceProperties events (one for each matching resource), and the property names will be provided through the Properties properties.

Depth is used to determine which resources or properties are retrieved from the server. A depth of ResourceOnly will return only the resource associated with ResourceURI, or its properties. A depth of Infinity will return all resources contained within hierarchy, or their collective properties.

Note: Some servers (such as IIS 7.5) may not support a depth of Infinity by default and may return a HTTP 403 Forbidden response.

GetProperty Method (WebDAV Component)

Get the value for a particular property.

Syntax

function GetProperty(PropertyName: String): String;

Remarks

The component will search through its internal Properties properties for the property identified by PropertyName and will return the value associated with it.

PropertyName may also be a partial XPath expression to the retrieved resource XML. This is useful for reading values of composite properties.

GetResource Method (WebDAV Component)

Get a resource using the WebDAV GET method.

Syntax

procedure GetResource(ResourceURI: String);

Remarks

Fetch the resource using the WebDAV GET method. The resource contents are delivered through the Transfer event, and the HTTP response headers through the Header event.

Interrupt Method (WebDAV Component)

Interrupt the current method.

Syntax

procedure Interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

ListDirectory Method (WebDAV Component)

List the files and subdirectories of the ResourceURI .

Syntax

procedure ListDirectory(ResourceURI: String);

Remarks

This method will return a list of resources from the specified URI. The results will be returned through one or more DirList events (one for each matching resource).

Depth is used to determine which resources or properties are retrieved from the server. A depth of ResourceOnly will return only the resource associated with ResourceURI, or its properties. A depth of Infinity will return all resources contained within hierarchy, or their collective properties.

Note: Some servers (such as IIS 7.5) may not support a depth of Infinity by default and may return a HTTP 403 Forbidden response.

LockResource Method (WebDAV Component)

Obtain a lock for a specified resource.

Syntax

procedure LockResource(ResourceURI: String);

Remarks

The LockResource method will request a new lock to be placed on ResourceURI in the user's name so that only the user can operate on it. The method is linked to a number of properties that it uses to generate the lock request:

This method is associated with the Depth property. If Depth is set to "0", the component will lock only ResourceURI and its properties. If Depth is set to "infinity", the component will lock ResourceURI and its entire subtree.

If MoveResource or CopyResource are used to place a resource or collection in a location under a resource locked with "infinity", the new resource or collection will be added to the lock. Any lock on a collection will prevent non-lock owners from adding resources to that collection.

MakeDirectory Method (WebDAV Component)

Make a new directory.

Syntax

procedure MakeDirectory(ResourceURI: String);

Remarks

A new resource collection is created at the location specified by ResourceURI.

MoveResource Method (WebDAV Component)

Moves one resource to a new location.

Syntax

procedure MoveResource(SourceResourceURI: String; DestinationResourceURI: String);

Remarks

The MoveResource method will move the resource indicated by SourceResourceURI to a new location under the resource indicated by DestinationResourceURI.

This method is associated with the Depth property. If Depth is set to "0", the component will move only SourceResourceURI. If Depth is set to "infinity", the component will move SourceResourceURI and its entire subtree to locations relative to it.

If the user has acquired a LockResource of infinite depth on either DestinationResourceURI or any collection it is under, SourceResourceURI will be added to that lock.

PatchProperties Method (WebDAV Component)

Update the current set of properties on the server.

Syntax

procedure PatchProperties(ResourceURI: String);

Remarks

When the user calls PatchProperties, the component will send a request to the server to update the existing property list. The method is linked to the Properties property: the component will use the Operation field to tell the server what to do with the properties.

PostToResource Method (WebDAV Component)

Posts data to a resource using the WebDAV POST method.

Syntax

procedure PostToResource(ResourceURI: String; PostData: TBytes);

Remarks

Posts data to the resource ResourceURI using the WebDAV POST method. The posted data is taken from PostData. The server response text is received through the Transfer event, and the HTTP response headers through the Header event. If LocalFile is not empty the data (not the headers) is written there as well.

PutResource Method (WebDAV Component)

Send data to the server using the PUT method.

Syntax

procedure PutResource(ResourceURI: String);

Remarks

The data is taken from LocalFile. The server will normally require authentication for this operation, so User and Password must have valid values before the request is made.

Reset Method (WebDAV Component)

Reset the component.

Syntax

procedure Reset();

Remarks

This method will reset the component's properties to their default values.

SetProperty Method (WebDAV Component)

Set the value of a property.

Syntax

procedure SetProperty(PropertyName: String; PropertyValue: String);

Remarks

This method is used to set a single property to a certain value. The name and new value of the property must be supplied in the parameters for this method.

NOTE: This is the same as calling the PatchProperties on one property where the operation is opSet.

Example

Control.SetProperty("MyProperty", "MyValue")

is equivalent to: Control.PropertyCount = 1 Control.PropertyName(0) = "MyProperty" Control.PropertyValue(0) = "MyValue" Control.PropertyOperation(0) = opSet Control.PatchProperties()

UnLockResource Method (WebDAV Component)

Unlocks a resource.

Syntax

procedure UnLockResource(ResourceURI: String);

Remarks

Before calling UnLockResource on a particular resource, the LockTokens property must be set to the lock tokens for ResourceURI. The method will remove the lock, allowing other users or non-privileged users to access and operate on the file.

Connected Event (WebDAV Component)

This event is fired immediately after a connection completes (or fails).

Syntax

type TConnectedEvent = procedure (
  Sender: TObject;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnConnected: TConnectedEvent read FOnConnected write FOnConnected;

Remarks

If the connection is made normally, StatusCode is 0 and Description is 'OK'.

If the connection fails, StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (WebDAV Component)

This event is fired to indicate changes in the connection state.

Syntax

type TConnectionStatusEvent = procedure (
  Sender: TObject;
  const ConnectionEvent: String;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnConnectionStatus: TConnectionStatusEvent read FOnConnectionStatus write FOnConnectionStatus;

Remarks

The ConnectionStatus event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

DirList Event (WebDAV Component)

Fires for each entry returned in a directory listing.

Syntax

type TDirListEvent = procedure (
  Sender: TObject;
  const ResourceURI: String;
  const DisplayName: String;
  const ContentLanguage: String;
  const ContentLength: String;
  const ContentType: String;
  const LastModified: String
) of Object;

property OnDirList: TDirListEvent read FOnDirList write FOnDirList;

Remarks

The DirList event is fired when a directory listing is received as a response to ListDirectory.

The StartTransfer and EndTransfer events mark the beginning and end of the event stream.

Disconnected Event (WebDAV Component)

This event is fired when a connection is closed.

Syntax

type TDisconnectedEvent = procedure (
  Sender: TObject;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnDisconnected: TDisconnectedEvent read FOnDisconnected write FOnDisconnected;

Remarks

If the connection is broken normally, StatusCode is 0 and Description is 'OK'.

If the connection is broken for any other reason, StatusCode has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

EndTransfer Event (WebDAV Component)

Fired when a document finishes transferring.

Syntax

type TEndTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer
) of Object;

property OnEndTransfer: TEndTransferEvent read FOnEndTransfer write FOnEndTransfer;

Remarks

The EndTransfer event is fired when the document text finishes transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Error Event (WebDAV Component)

Fired when information is available about errors during data delivery.

Syntax

type TErrorEvent = procedure (
  Sender: TObject;
  ErrorCode: Integer;
  const Description: String
) of Object;

property OnError: TErrorEvent read FOnError write FOnError;

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component raises an exception.

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

Header Event (WebDAV Component)

This event is fired every time a header line comes in.

Syntax

type THeaderEvent = procedure (
  Sender: TObject;
  const Field: String;
  const Value: String
) of Object;

property OnHeader: THeaderEvent read FOnHeader write FOnHeader;

Remarks

The Field parameter contains the name of the HTTP header (which is the same as it is delivered). The Value parameter contains the header contents.

If the header line being retrieved is a continuation header line, then the Field parameter contains '' (empty string).

Log Event (WebDAV Component)

This event fires once for each log message.

Syntax

type TLogEvent = procedure (
  Sender: TObject;
  LogLevel: Integer;
  const Message: String;
  const LogType: String
) of Object;

property OnLog: TLogEvent read FOnLog write FOnLog;

Remarks

This event fires once for each log message generated by the component. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the level of message. Possible values are as follows:

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

Message is the log entry.

LogType identifies the type of log entry. Possible values are as follows:

• "Info"
• "RequestHeaders"
• "ResponseHeaders"
• "RequestBody"
• "ResponseBody"
• "ProxyRequest"
• "ProxyResponse"
• "FirewallRequest"
• "FirewallResponse"

Redirect Event (WebDAV Component)

This event is fired when a redirection is received from the server.

Syntax

type TRedirectEvent = procedure (
  Sender: TObject;
  const Location: String;
  var Accept: Boolean
) of Object;

property OnRedirect: TRedirectEvent read FOnRedirect write FOnRedirect;

Remarks

This event is fired in cases in which the client can decide whether or not to continue with the redirection process. The Accept parameter is always True by default, but if you do not want to follow the redirection, Accept may be set to False, in which case the component raises an exception. Location is the location to which the client is being redirected. Further control over redirection is provided in the FollowRedirects property.

ResourceProperties Event (WebDAV Component)

Fires for each entry returned through a property search.

Syntax

type TResourcePropertiesEvent = procedure (
  Sender: TObject;
  const ResourceURI: String;
  const ResourceProperties: String
) of Object;

property OnResourceProperties: TResourcePropertiesEvent read FOnResourceProperties write FOnResourceProperties;

Remarks

The ResourceProperties event is fired when resource properties are received as a response to FindProperties.

The StartTransfer and EndTransfer events mark the beginning and end of the event stream.

The ResourceProperties contains the full XML containing the properties of the resource.

ResourceURI contains the name of the resource.

The parsed property names, values, and status are contained within the Properties properties.

SetCookie Event (WebDAV Component)

This event is fired for every cookie set by the server.

Syntax

type TSetCookieEvent = procedure (
  Sender: TObject;
  const Name: String;
  const Value: String;
  const Expires: String;
  const Domain: String;
  const Path: String;
  Secure: Boolean
) of Object;

property OnSetCookie: TSetCookieEvent read FOnSetCookie write FOnSetCookie;

Remarks

The SetCookie event is fired for every Set-Cookie: header received from the HTTP server.

The Name parameter contains the name of the cookie, with the corresponding value supplied in the Value parameter.

The Expires parameter contains an expiration time for the cookie (if provided by the server). The time format used is "Weekday, DD-Mon-YY HH:MM:SS GMT". If the server does not provide an expiration time, the Expires parameter will be an empty string. In this case, the convention is to drop the cookie at the end of the session.

The Domain parameter contains a domain name to limit the cookie to (if provided by the server). If the server does not provide a domain name, the Domain parameter will be an empty string. The convention in this case is to use the server specified in the URL (URLServer) as the cookie domain.

The Path parameter contains a path name to limit the cookie to (if provided by the server). If the server does not provide a cookie path, the Path parameter will be an empty string. The convention in this case is to use the path specified in the URL (URLPath) as the cookie path.

The Secure parameter specifies whether the cookie is secure. If the value of this parameter is True, the cookie value must be submitted only through a secure (HTTPS) connection.

SSLServerAuthentication Event (WebDAV Component)

Fired after the server presents its certificate to the client.

Syntax

type TSSLServerAuthenticationEvent = procedure (
  Sender: TObject;
  CertEncoded: String;
  CertEncodedB: TBytes;
  const CertSubject: String;
  const CertIssuer: String;
  const Status: String;
  var Accept: Boolean
) of Object;

property OnSSLServerAuthentication: TSSLServerAuthenticationEvent read FOnSSLServerAuthentication write FOnSSLServerAuthentication;

Remarks

During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string OK). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (WebDAV Component)

Fired when secure connection progress messages are available.

Syntax

type TSSLStatusEvent = procedure (
  Sender: TObject;
  const Message: String
) of Object;

property OnSSLStatus: TSSLStatusEvent read FOnSSLStatus write FOnSSLStatus;

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

StartTransfer Event (WebDAV Component)

Fired when a document starts transferring (after the headers).

Syntax

type TStartTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer
) of Object;

property OnStartTransfer: TStartTransferEvent read FOnStartTransfer write FOnStartTransfer;

Remarks

The StartTransfer event is fired when the document text starts transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Status Event (WebDAV Component)

This event is fired when the HTTP status line is received from the server.

Syntax

type TStatusEvent = procedure (
  Sender: TObject;
  const HTTPVersion: String;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnStatus: TStatusEvent read FOnStatus write FOnStatus;

Remarks

HTTPVersion is a string containing the HTTP version string as returned from the server (e.g., "1.1").

StatusCode contains the HTTP status code (e.g., 200), and Description the associated message returned by the server (e.g., "OK").

Transfer Event (WebDAV Component)

This event is fired while a document transfers (delivers document).

Syntax

type TTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer;
  BytesTransferred: Int64;
  PercentDone: Integer;
  Text: String;
  TextB: TBytes
) of Object;

property OnTransfer: TTransferEvent read FOnTransfer write FOnTransfer;

Remarks

The Text parameter contains the portion of the document text being received. It is empty if data are being posted to the server.

The BytesTransferred parameter contains the number of bytes transferred in this Direction since the beginning of the document text (excluding HTTP response headers).

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

DAVProperty Type

A property that is either sent to or received from the server.

Remarks

This type defines a property that is used when the component sends a property find or patch request to the server. When FindProperties is used, this property will be populated with the properties returned from the server. When a call is made to PatchProperties, the component will use the information provided by this type to tell the server what to do with the property being specified.

Fields

Constructors

constructor Create();

constructor Create(valName: String);

DAVResource Type

A resource as returned in a directory listing from the WebDAV component.

Remarks

This type describes a resource that has been returned by the server during a response to a ListDirectory request. The DAVResource type contains fields which describe each listing as returned from the server.

Fields

Constructors

constructor Create();

Firewall Type

The firewall the component will connect through.

Remarks

When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.

Fields

Constructors

constructor Create();

Header Type

This is an HTTP header as it is received from the server.

Remarks

When a header is received through a Header event, it is parsed into a Header type. This type contains a Field, and its corresponding Value.

Fields

Constructors

constructor Create();

constructor Create(valField: String; valValue: String);

HTTPCookie Type

An HTTP cookie can be either sent to or received from the server.

Remarks

An HTTP cookie can store the cookies that are to be sent to the server. It also may store the cookies sent by the server.

Cookies that are to be sent to the server must have the Name and Value fields supplied before submitting the URL. When the SetCookie event is fired, however, all of the fields of an HTTPCookie are filled out accordingly.

Fields

Constructors

constructor Create();

constructor Create(valName: String; valValue: String);

Proxy Type

The proxy the component will connect to.

Remarks

When connecting through a proxy, this type is used to specify different properties of the proxy, such as the Server and the AuthScheme.

Fields

Constructors

constructor Create();

constructor Create(valServer: String; valPort: Integer);

constructor Create(valServer: String; valPort: Integer; valUser: String; valPassword: String);

XMLNamespace Type

An XML namespace from the current namespace stack.

Remarks

This type describes an XML namespace from the current stack. It includes fields to denote the Prefix and the URI of the namespace being defined.

The default namespace exists at index 0. The Prefix field at index 0 is "xmlns", and the Name field contains the default namespace.

Fields

Constructors

constructor Create();

Config Settings (WebDAV Component)

WebDAV Config Settings

HTTP Config Settings

TCPClient Config Settings

SSL Config Settings

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

Socket Config Settings

Base Config Settings

Trappable Errors (WebDAV Component)

WebDAV Errors

The component may also return one of the following error codes, which are inherited from other components.

HTTP Errors

The component may also return one of the following error codes, which are inherited from other components.

TCPClient Errors

SSL Errors

TCP/IP Errors