OData Component

Properties   Methods   Events   Configuration Settings   Errors  

The OData component implements the Open Data Protocol (OData). It can be used to query, parse, and update/modify data contained within an OData service.

Syntax

TipwOData

Remarks

The OData 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 OData component allows you to easily query OData services and create, update, and delete entries within a service. To query a service, you can set the ServiceRootURI to the service's root URI and ResourcePath to the collection within the service that you wish to query. Optionally you can set the Query*** properties to filter the results. QueryService can then be called to retrieve the results (which can be viewed via the Entry*** properties).


  OData1.ServiceRootURI = "http://services.odata.org/OData/OData.svc"
  OData1.ResourcePath = "Products"
  OData1.QueryService()

To create a new entry, you can set the ServiceRootURI to the service's root URI and ResourcePath to the collection within the service that you wish to add the entry to. The Entry*** properties can be set to the values you wish to use to create the entry. CreateEntry can then be called to create the entry.


  OData1.ServiceRootURI = "http://services.odata.org/OData/OData.svc"
  OData1.ResourcePath = "Products"
  OData1.EntryProperties
  OData1.CreateEntry()

If you wish to update an entry, you can set the ServiceRootURI to the service's root URI and ResourcePath to the specific entry you wish to update. The Entry*** properties can be set to the values you wish to update. UpdateEntry can then be called to update the entry.


  OData1.ServiceRootURI = "http://services.odata.org/OData/OData.svc"
  OData1.ResourcePath = "Products(1)"
  // Index 1 is the "Name" property.
  OData1.EntryProperties[1].Value = "MyNewName"
  OData1.UpdateEntry()

Deleting an entry requires that you first set the ServiceRootURI to the service's root URI and ResourcePath to the specific entry you wish to delete. DeleteEntry can then be called to delete the entry.


  OData1.ServiceRootURI = "http://services.odata.org/OData/OData.svc"
  OData1.ResourcePath = "Products(1)"
  OData1.DeleteEntry()

In addition to querying a service and manipulating its containing data, the OData component also allows you to retrieve the schema (metadata document) to determine the structure of a service. After setting ServiceRootURI to the root URI of the service, GetSchema can be called to retrieve the metadata document. The Schema*** properties will be populated upon successful retrieval of the metadata document allowing you to identify the structure of the service.


  OData1.ServiceRootURI = "http://services.odata.org/OData/OData.svc"
  OData1.GetSchema()

Property List


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

AuthorizationThe Authorization string to be sent to the server.
AuthSchemeThe authentication scheme to use when server authorization is required.
ChannelThe feed elements of a feed.
CookiesCollection of cookies.
EntryAuthorThe Author of the current entry in an OData feed.
EntryCountThe number of entries contained within an OData feed.
EntryETagThe ETag of the current entry in an OData feed.
EntryIdThe ID of the current entry in an OData feed.
EntryIndexThe index of the current entry in an OData feed.
EntryLinksA collection of links in the current OData entry.
EntryPropertiesA collection of elements in the current OData entry.
EntrySummaryThe Summary of the current entry in an OData feed.
EntryTitleThe Title of the current entry in an OData feed.
EntryTypeThe entry category or type.
EntryUpdatedThe Date-Time when current entry in an OData feed was updated.
EntryXMLThe raw XML of the current entry in an OData feed.
FirewallA set of properties related to firewall access.
IdleThe current status of the component.
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
ODataVersionThe OData Version.
OtherHeadersOther headers as determined by the user (optional).
OtherQueryOptionsAdditional Query Options to be used when querying a service.
ParsedHeadersCollection of headers returned from the last request.
PasswordA password if authentication is to be used.
ProxyA set of properties related to proxy access.
QueryFilterSelects only the entries that satisfy the specified filter (expression).
QueryOrderByThe value used to order entries when querying a service.
QuerySelectSelects only the specified properties to be returned in an entry when querying a service.
QuerySkipThe number of entries to skip when querying a service.
QuerySkipTokenToken given by an OData server when the last query result collection is too large.
QueryTopSelects the first N entries when querying a service.
ResourcePathThe Resource Path of an OData service.
SchemaAssociationThe navigation properties and their corresponding associations contained within an entity of a service schema.
SchemaAssociationCountThe number of navigation properties contained within an OData schema entity.
SchemaAssociationIndexThe index of the current navigation property in an OData schema entity.
SchemaEntityThe entities contained within a service schema.
SchemaEntityCountThe number of entities contained within an OData schema.
SchemaEntityIndexThe index of the current entity in an OData schema.
SchemaKeysCountThe number of records in the SchemaKeys array.
SchemaKeysThe keys of a schema entity.
SchemaPropertyThe properties contained within an entity of a service schema.
SchemaPropertyCountThe number of properties contained within an OData schema entity.
SchemaPropertyIndexThe index of the current property in an OData schema entity.
SchemaTypeFieldThe fields (properties) contained within a complex type.
SchemaTypeFieldCountThe number of properties contained within an OData schema complex type.
SchemaTypeFieldIndexThe index of the current field (property) in an OData schema complex type.
ServiceRootURIThe root URI of an OData service.
SSLAcceptServerCertEncodedThe certificate (PEM/base64 encoded).
SSLCertEncodedThe certificate (PEM/base64 encoded).
SSLCertStoreThe name of the certificate store for the client certificate.
SSLCertStorePasswordIf the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store.
SSLCertStoreTypeThe type of certificate store for this certificate.
SSLCertSubjectThe subject of the certificate used for client authentication.
SSLServerCertEncodedThe certificate (PEM/base64 encoded).
TimeoutA timeout for the component.
TransferredDataThe contents of the last response from the server.
UserA user name if authentication is to be used.

Method List


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

ConfigSets or retrieves a configuration setting.
CreateEntryCreates a new entry within the specified OData service resource.
CustomRequestSends a request to the specified URL using the HTTP Method and Post Data provided.
DeleteEntryDeletes an entry within an OData service resource.
GetEntryPropertyGet an OData entry property.
GetSchemaRetrieves the schema for a service.
HasXPathDetermines whether a specific element exists in the document.
QueryServiceQueries an OData service using the specified parameters.
ResetReset all properties of the component.
SetEntryPropertySet an OData entry property.
SetSchemaEntitySets the schema entity.
SetSchemaPropertySets the schema property.
SetSchemaTypeSets the schema type.
UpdateEntryUpdate an OData entry.
UpdatePropertyUpdate an OData entry property.

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.

ConnectedFired immediately after a connection completes (or fails).
DisconnectedFired when a connection is closed.
EndTransferFired when a document finishes transferring.
EntityFired once for each entity retrieved.
EntryFired once for each entry retrieved.
ErrorInformation about errors during data delivery.
HeaderFired every time a header line comes in.
LogFires once for each log message.
PropertyFired once for each property found within an entity.
SetCookieFired for every cookie set by the server.
SSLServerAuthenticationFired after the server presents its certificate to the client.
SSLStatusShows the progress of the secure connection.
StartTransferFired when a document starts transferring (after the headers).
StatusFired when the HTTP status line is received from the server.
TransferFired while a document transfers (delivers document).

Configuration Settings


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

EncodeResourcePathWhether the ResourcePath is URL encoded.
NameAndEmailFormatDetermines how the data of the name and e-mail properties will be formatted.
TransferredHeadersThe full set of headers as received from the server.
AcceptEncodingUsed to tell the server which types of content encodings the client supports.
AllowHTTPCompressionThis property enables HTTP compression for receiving data.
AllowHTTPFallbackWhether HTTP/2 connections are permitted to fallback to HTTP/1.1.
AppendWhether to append data to LocalFile.
AuthorizationThe Authorization string to be sent to the server.
BytesTransferredContains the number of bytes transferred in the response data.
ChunkSizeSpecifies the chunk size in bytes when using chunked encoding.
CompressHTTPRequestSet to true to compress the body of a PUT or POST request.
EncodeURLIf set to true the URL will be encoded by the component.
FollowRedirectsDetermines what happens when the server issues a redirect.
GetOn302RedirectIf set to true the component will perform a GET on the new location.
HTTP2HeadersWithoutIndexingHTTP2 headers that should not update the dynamic header table with incremental indexing.
HTTPVersionThe version of HTTP used by the component.
IfModifiedSinceA date determining the maximum age of the desired document.
KeepAliveDetermines whether the HTTP connection is closed after completion of the request.
KerberosSPNThe Service Principal Name for the Kerberos Domain Controller.
LogLevelThe level of detail that is logged.
MaxRedirectAttemptsLimits the number of redirects that are followed in a request.
NegotiatedHTTPVersionThe negotiated HTTP version.
OtherHeadersOther headers as determined by the user (optional).
ProxyAuthorizationThe authorization string to be sent to the proxy server.
ProxyAuthSchemeThe authorization scheme to be used for the proxy.
ProxyPasswordA password if authentication is to be used for the proxy.
ProxyPortPort for the proxy server (default 80).
ProxyServerName or IP address of a proxy server (optional).
ProxyUserA user name if authentication is to be used for the proxy.
SentHeadersThe full set of headers as sent by the client.
StatusLineThe first line of the last response from the server.
TransferredDataThe contents of the last response from the server.
TransferredDataLimitThe maximum number of incoming bytes to be stored by the component.
TransferredHeadersThe full set of headers as received from the server.
TransferredRequestThe full request as sent by the client.
UseChunkedEncodingEnables or Disables HTTP chunked encoding for transfers.
UseIDNsWhether to encode hostnames to internationalized domain names.
UserAgentInformation about the user agent (browser).
CloseStreamAfterTransferIf true, the component will close the upload or download stream after the transfer.
ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHostName or IP address of firewall (optional).
FirewallPasswordPassword to be used if authentication is to be used when connecting through the firewall.
FirewallPortThe TCP port for the FirewallHost;.
FirewallTypeDetermines the type of firewall to connect through.
FirewallUserA user name if authentication is to be used connecting through a firewall.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
LingerWhen set to True, connections are terminated gracefully.
LingerTimeTime in seconds to have the connection linger.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe port in the local host where the component binds.
MaxLineLengthThe maximum amount of data to accumulate when no EOL is found.
MaxTransferRateThe transfer rate limit in bytes per second.
ProxyExceptionsListA semicolon separated list of hosts and IPs to bypass when using a proxy.
TCPKeepAliveDetermines whether or not the keep alive socket option is enabled.
TcpNoDelayWhether or not to delay when sending packets.
UseIPv6Whether to use IPv6.
LogSSLPacketsControls whether SSL packets are logged when using the internal security API.
OpenSSLCADirThe path to a directory containing CA certificates.
OpenSSLCAFileName of the file containing the list of CA's trusted by your application.
OpenSSLCipherListA string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedDataThe data to seed the pseudo random number generator (PRNG).
ReuseSSLSessionDetermines if the SSL session is reused.
SSLCACertsA newline separated list of CA certificate to use during SSL client authentication.
SSLCheckCRLWhether to check the Certificate Revocation List for the server certificate.
SSLCipherStrengthThe minimum cipher strength used for bulk encryption.
SSLEnabledCipherSuitesThe cipher suite to be used in an SSL negotiation.
SSLEnabledProtocolsUsed to enable/disable the supported security protocols.
SSLEnableRenegotiationWhether the renegotiation_info SSL extension is supported.
SSLIncludeCertChainWhether the entire certificate chain is included in the SSLServerAuthentication event.
SSLNegotiatedCipherReturns the negotiated ciphersuite.
SSLNegotiatedCipherStrengthReturns the negotiated ciphersuite strength.
SSLNegotiatedCipherSuiteReturns the negotiated ciphersuite.
SSLNegotiatedKeyExchangeReturns the negotiated key exchange algorithm.
SSLNegotiatedKeyExchangeStrengthReturns the negotiated key exchange algorithm strength.
SSLNegotiatedVersionReturns the negotiated protocol version.
SSLProviderThe name of the security provider to use.
SSLSecurityFlagsFlags that control certificate verification.
SSLServerCACertsA newline separated list of CA certificate to use during SSL server certificate validation.
TLS12SignatureAlgorithmsDefines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True.
TLS12SupportedGroupsThe supported groups for ECC.
TLS13KeyShareGroupsThe groups for which to pregenerate key shares.
TLS13SignatureAlgorithmsThe allowed certificate signature algorithms.
TLS13SupportedGroupsThe supported groups for (EC)DHE key exchange.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
BuildInfoInformation about the product's build.
CodePageThe system code page used for Unicode to Multibyte translations.
LicenseInfoInformation about the current license.
UseInternalSecurityAPITells the component whether or not to use the system security libraries or an internal implementation.

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IPWorks 2020 Delphi Edition - Version 20.0 [Build 8307]