RSS Class

Properties   Methods   Events   Configuration Settings   Errors  

The RSS Class is used to retrieve, parse, edit, and write RSS syndicated content.

Class Name

IPWorks_RSS

Procedural Interface

 ipworks_rss_open();
 ipworks_rss_close($res);
 ipworks_rss_register_callback($res, $id, $function);
 ipworks_rss_get_last_error($res);
 ipworks_rss_get_last_error_code($res);
 ipworks_rss_set($res, $id, $index, $value);
 ipworks_rss_get($res, $id, $index);
 ipworks_rss_do_addcookie($res, $cookiename, $cookievalue);
 ipworks_rss_do_additem($res, $title, $description, $link);
 ipworks_rss_do_addnamespace($res, $prefix, $namespaceuri);
 ipworks_rss_do_config($res, $configurationstring);
 ipworks_rss_do_doevents($res);
 ipworks_rss_do_getfeed($res, $url);
 ipworks_rss_do_getproperty($res, $propertyname);
 ipworks_rss_do_geturl($res, $url);
 ipworks_rss_do_interrupt($res);
 ipworks_rss_do_opmlattr($res, $attrname);
 ipworks_rss_do_put($res, $url);
 ipworks_rss_do_readfile($res, $filename);
 ipworks_rss_do_readopml($res, $opmlfile);
 ipworks_rss_do_reset($res);
 ipworks_rss_do_setproperty($res, $propertyname, $propertyvalue);
 ipworks_rss_do_writefile($res, $filename);

Remarks

The RSS Class 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 RSS Class implements a standard RSS newsreader with extended capabilities as specified at http://backend.userland.com/rss2.

The class contains a number of properties that map directly to RSS fields. To receive a feed call the GetFeed method with the URL or file to retrieve specified in the URL parameter. The RSS class can also generate RSS feeds, which can be retrieved through the RSSData property or written through the WriteFile method.

The RSS Class supports all RSS feed properties that are standard in versions 0.91, 0.92 and 2.0 of the RSS protocol through a number of class properties. It also supports non-standard properties as specified in the RSS protocol through the Namespaces properties and the GetProperty and SetProperty methods.

Property List


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

AcceptA list of acceptable MIME types for the request.
AuthorizationThe Authorization string to be sent to the server.
AuthSchemeThe authentication scheme to use when server authorization is required.
ChannelCategoryThe value of this property is a forward-slash-separated string that identifies a hierarchic location in a particular hierarchy.
ChannelCategoryDomainThis property contains the URL indicating the definition of the current RSS channel's category.
ChannelCopyrightThis property contains the copyright information for the current RSS channel (500 char max).
ChannelDescriptionThis property contains a textual description of the current RSS feed (Required - 500 char max).
ChannelDocsThis should contain a URL for the documentation describing what format was used to create the current RSS channel.
ChannelGeneratorThis property contains the name of the program which created the RSS feed.
ChannelImageDescriptionThis property is used to specify text that is included in the title attribute of the image's link formed in HTML rendering.
ChannelImageHeightThis property contains the height of the image in pixels.
ChannelImageLinkThis property contains the URL associated with the channel's associated image.
ChannelImageTitleThis property contains the title of the channel's associated image.
ChannelImageUrlThis property contains the URL location of the channel's associated image.
ChannelImageWidthThis property contains the width of the image in pixels.
ChannelLanguageThis property is required for feeds that conform to version 0.
ChannelLastBuildDateThis property contains the date of the current RSS channel's most recent content changes.
ChannelLinkThis property contains the URL that corresponds to the website where the RSS channel is located (Required - 500 char max).
ChannelManagingEditorThis property contains the email address or contact information for the current RSS channel's editor.
ChannelPubDateThis property contains the date of the current RSS channel's most recent publication.
ChannelSkipDaysThis property contains a list of days in which aggregators may skip reading the channel.
ChannelSkipHoursThis property contains a list of hours in which aggregators may skip reading the channel.
ChannelTitleThis property contains the title of the current RSS Feed (Required - 40 char max).
ChannelTtlThis property contains a number of minutes that represents how long the channel may be cached before it needs to be refreshed from the source.
ChannelWebMasterThis property contains the email address or contact information for the current RSS channel's webmaster.
ConnectedShows whether the class is connected.
CookieCountThe number of records in the Cookie arrays.
CookieDomainThe domain of a received cookie.
CookieExpirationThis property contains an expiration time for the cookie (if provided by the server).
CookieNameThe name of the cookie.
CookiePathThis property contains a path name to limit the cookie to (if provided by the server).
CookieSecureThis property contains the security flag of the received cookie.
CookieValueThis property contains the value of the cookie.
FirewallAutoDetectThis property tells the class whether or not to automatically detect and use firewall system settings, if available.
FirewallTypeThis property determines the type of firewall to connect through.
FirewallHostThis property contains the name or IP address of firewall (optional).
FirewallPasswordThis property contains a password if authentication is to be used when connecting through the firewall.
FirewallPortThis property contains the TCP port for the firewall Host .
FirewallUserThis property contains a user name if authentication is to be used connecting through a firewall.
FollowRedirectsDetermines what happens when the server issues a redirect.
IdleThe current status of the class.
IfModifiedSinceA date determining the maximum age of the desired document.
ItemCountThe number of records in the Item arrays.
ItemAuthorThis property contains the email address or contact information for the current item's author.
ItemCategoryThis property contains the location of the current item within a hierarchy.
ItemCategoryDomainThis property contains the URL indicating the definition of the current item's category.
ItemCommentsIf present, this property should point to a URL location of a page for comments related to the current item.
ItemDescriptionThis property contains the description of the content of the current item.
ItemEnclosureLengthThis property indicates how large the enclosure is in bytes.
ItemEnclosureTypeThis property specifies the type of enclosure.
ItemEnclosureUrlThis property contains the URL where the enclosure is located.
ItemGuidThis property contains the globally unique identifier for the current item.
ItemGuidIsPermaLinkWhen this property is set to true, the reader may assume that the guid is a permalink to the item.
ItemXMLThis property contains the full XML contents of the item.
ItemLinkFor headline or abstract items, this property should be the location of the full text of the item.
ItemPubDateThis property contains the date of the current item's most recent publication.
ItemSourceThis property contains the name of the RSS feed in which the item was originally published, derived from the feed's title.
ItemSourceURLThis property contains the URL location of the XML-version of the current item's source.
ItemTitleThis property contains the title or headline of the current item.
LocalFileThe path to a local file for downloading. If the file exists, it is overwritten.
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
NamespaceCountThe number of records in the Namespace arrays.
NamespacePrefixThe Prefix for the Namespace .
NamespaceURINamespace URI associated with the corresponding Prefix .
OtherHeadersOther headers as determined by the user (optional).
ParsedHeaderCountThe number of records in the ParsedHeader arrays.
ParsedHeaderFieldThis property contains the name of the HTTP header (same case as it is delivered).
ParsedHeaderValueThis property contains the header contents.
PasswordA password if authentication is to be used.
ProxyAuthSchemeThis property is used to tell the class which type of authorization to perform when connecting to the proxy.
ProxyAutoDetectThis property tells the class whether or not to automatically detect and use proxy system settings, if available.
ProxyPasswordThis property contains a password if authentication is to be used for the proxy.
ProxyPortThis property contains the TCP port for the proxy Server (default 80).
ProxyServerIf a proxy Server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.
ProxySSLThis property determines when to use SSL for the connection to the proxy.
ProxyUserThis property contains a user name, if authentication is to be used for the proxy.
RefererReferer URL/document (optional).
RSSDataThe complete text of the RSS XML file.
RSSVersionThe RSS protocol version of the current RSS feed.
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 class.
TransferredDataThe contents of the last response from the server.
TransferredDataLimitThe maximum of bytes of data to be transferred.
TransferredHeadersThe full set of headers as received 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 class with short descriptions. Click on the links for further details.

AddCookieAdds a cookie and the corresponding value to the outgoing request headers.
AddItemInserts a new item into the beginning of an RSS feed.
AddNamespaceAdds a namespace to the Namespaces properties.
ConfigSets or retrieves a configuration setting.
DoEventsProcesses events from the internal message queue.
GetFeedFetches an RSS feed.
GetPropertyGets the value of a specific RSS feed item element or attribute.
GetURLFetches an RSS feed.
InterruptInterrupt the current method.
OPMLAttrReturns the value of the attribute specified in the parameter.
PutSends data to the HTTP server using the HTTP PUT method.
ReadFileLoads an RSS file into the class.
ReadOPMLReads and parses an OPML file.
ResetResets all properties of the class.
SetPropertySets the value of a specific RSS feed property.
WriteFileWrites an RSS feed from the class.

Event List


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

ConnectedFired immediately after a connection completes (or fails).
ConnectionStatusFired to indicate changes in connection state.
DisconnectedFired when a connection is closed.
EndTransferFired when a document finishes transferring.
ErrorInformation about errors during data delivery.
HeaderFired every time a header line comes in.
LogFires once for each log message.
OPMLHeaderFired for each value in the Header section of the current OPML document.
OPMLOutlineFired for each outline in the current OPML document.
RedirectFired when a redirection is received from the server.
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 class with short descriptions. Click on the links for further details.

ItemAdditionalData[i]Additional data to be added to an RSS Feed item.
ValueFormatFormat of data returned or set.
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 class.
FollowRedirectsDetermines what happens when the server issues a redirect.
GetOn302RedirectIf set to true the class 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 class.
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 class.
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.
UsePlatformHTTPClientWhether or not to use the platform HTTP client.
UserAgentInformation about the user agent (browser).
ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the class 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 class 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.
SSLCACertFilePathsThe paths to CA certificate files on Unix/Linux.
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.
ProcessIdleEventsWhether the class uses its internal event loop to process events when the main thread is idle.
SelectWaitMillisThe length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.
UseInternalSecurityAPITells the class whether or not to use the system security libraries or an internal implementation.

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