THttpCli

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Overview

• unit HttpProt.pas
• inheritance THttpCli - TComponent

THttpCli component is implementing the client side HTTP protocol described in RFC 1945 and RFC 2068. HTTP protocol is the standard protocol for browsing the World Wide Web. If you need an encrypted connection, use the SslHTTPCli component instead.

Properties

Accept		Mime types accepted in the reply.
AcceptLanguage		Languages accepted in the reply.
AcceptRanges		Ranges accepted.
Agent		User agent sent to server.
AuthorizationRequest		List of authentication methods.
Connection		Connection type for keep-alive.
ContentLength		Received document length.
ContentRangeBegin		Start of requested range.
ContentRangeEnd		End of requested range.
ContentType		Received document mime type.
ContentTypePost		Sent document mime type.
Cookie		Cookies to be sent.
CtrlSocket		The underlying instance of TWSocket handles the connection and raw data exchange.
DnsResult		Result of DNS request.
DocName		Received document name.
FollowRelocation		Tell the component o follow or not the relocations.
Handle		Hidden window handle.
Hostname		Hostname to which the URL point.
LastResponse		Last response from server.
LocalAddr		Local address to which underlying socket is bound.
Location		Where the relocation will take place.
ModifiedSince		Requested modification datetime.
MultiThreaded		To tell the component it runs within a thread.
NoCache		Tell the server to not cache the request.
Options		Options.
Protocol		Protocol extracted from the URL.
Proxy		Proxy to traverse to before connecting. The IP address or hostname of the proxy server.
ProxyConnection		Type of proxy connection. "Keep-Alive" or blank.
ProxyPort		Port to be used to connect to proxy.
ProxyURL		Combines four proxy properties as a URL for simplicity, i.e. http://[user[:password]@]host:port. Set ProxyAuth if that is required.
RcvdCount		Bytes received.
RcvdHeader		Received header.
RcvdStream		Stream to receive a document.
ReasonPhrase		Status returned by server.
Reference		To send the referrer to the server.
RequestVer		HTTP version to be used in the request.
Sender		Sender to be sent to server.
SendStream		Stream to be posted.
SentCount		Bytes sent.
SocksAuthentication		Socks server authentication type.
SocksLevel		Sockers server protocol level.
SocksPassword		Socks server password.
SocksPort		Socks server port.
SocksServer		Socks server hostname or IP.
SocksUsercode		Socks server usercode.
State		Component state.
StatusCode		Server status code.
TransferEncoding		Received document transfer encoding.
URL		Complete URL to act on

Methods

Abort		Abort the current operation.
Close		Close the current connection (synchronous).
CloseAsync		Close the current connection (asynchronous).
Create		Create a new component instance.
Destroy		Destroy the current component instance.
Get		Request an URL using GET method (synchronous).
GetASync		Request an URL using GET method (asynchronous).
Head		Request the header for an URL (synchronous).
HeadASync		Request the header for an URL (asynchronous).
Post		Request an URL using the POST method (synchronous).
PostASync		Request an URL using the POST method (asynchronous).
Put		Request an URL using the PUT method (synchronous).
PutASync		Request an URL using the PUT method (asynchronous).

Events

OnBeforeHeaderSend		Triggered before the header is sent.
OnCommand		Triggered for each command sent.
OnCookie		Triggered when a cookie has been received.
OnDataPush		Received data outside of any request.
OnDataPush2		Received data outside of a header.
OnDocBegin		Triggered when the document part is about to be received.
OnDocData		Triggered for each packet of the document part.
OnDocEnd		Triggered when the document is complete.
OnHeaderBegin		Triggered when the first header line is about to be received.
OnHeaderData		Triggered for each received header line.
OnHeaderEnd		Triggered when the header has been completely received.
OnLocationChange		Triggered whenever the server sent a location change.
OnRequestDone		Triggered when a request is completed.
OnRequestHeaderBegin		Triggered when the first header line is about to be sent.
OnRequestHeaderEnd		Triggered when the last header line has been sent.
OnSendBegin		Triggered before sending document part.
OnSendData		Triggered when sending document part.
OnSendEnd		Triggered when document has been sent completely.
OnSessionClosed		Triggered when the current connection has been closed.
OnSessionConnected		Triggered when the connection has been openend.
OnSocketError		Triggered when a socket error occured.
OnSocksConnected		Triggered when connected to socks server.
OnSocksError		Triggered when a error occurs with the socks server.
OnStateChange		Triggered when component state change.

How to

How to implement a timeout for THttpCli in my application?

How to implement a progress for THttpCli in my application?

How to implement a download size limitation for THttpCli in my application?

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ICS Components Reference