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284 linhas
15 KiB
284 linhas
15 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title>Module ibrowse</title>
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<link rel="stylesheet" type="text/css" href="stylesheet.css" title="EDoc">
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</head>
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<body bgcolor="white">
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<div class="navbar"><a name="#navbar_top"></a><table width="100%" border="0" cellspacing="0" cellpadding="2" summary="navigation bar"><tr><td><a href="overview-summary.html" target="overviewFrame">Overview</a></td><td><a href="http://www.erlang.org/"><img src="erlang.png" align="right" border="0" alt="erlang logo"></a></td></tr></table></div>
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<hr>
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<h1>Module ibrowse</h1>
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<ul class="index"><li><a href="#description">Description</a></li><li><a href="#index">Function Index</a></li><li><a href="#functions">Function Details</a></li></ul>The ibrowse application implements an HTTP 1.1 client.
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<p>Copyright © 2005-2007 Chandrashekhar Mullaparthi</p>
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<p><b>Version:</b> 1.2.7</p>
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<p><b>Behaviours:</b> <a href="gen_server.html"><tt>gen_server</tt></a>.</p>
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<p><b>Authors:</b> Chandrashekhar Mullaparthi (<a href="mailto:chandrashekhar dot mullaparthi at gmail dot com"><tt>chandrashekhar dot mullaparthi at gmail dot com</tt></a>).</p>
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<h2><a name="description">Description</a></h2><p>The ibrowse application implements an HTTP 1.1 client. This
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module implements the API of the HTTP client. There is one named
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process called 'ibrowse' which acts as a load balancer. There is
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one process to handle one TCP connection to a webserver
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(implemented in the module ibrowse_http_client). Multiple connections to a
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webserver are setup based on the settings for each webserver. The
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ibrowse process also determines which connection to pipeline a
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certain request on. The functions to call are send_req/3,
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send_req/4, send_req/5, send_req/6.</p>
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<p>Here are a few sample invocations.</p>
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<p><code>
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ibrowse:send_req("http://intranet/messenger/", [], get).
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<br><br>
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ibrowse:send_req("http://www.google.com/", [], get, [],
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[{proxy_user, "XXXXX"},
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{proxy_password, "XXXXX"},
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{proxy_host, "proxy"},
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{proxy_port, 8080}], 1000).
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<br><br>
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ibrowse:send_req("http://www.erlang.org/download/otp_src_R10B-3.tar.gz", [], get, [],
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[{proxy_user, "XXXXX"},
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{proxy_password, "XXXXX"},
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{proxy_host, "proxy"},
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{proxy_port, 8080},
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{save_response_to_file, true}], 1000).
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<br><br>
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ibrowse:set_dest("www.hotmail.com", 80, [{max_sessions, 10},
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{max_pipeline_size, 1}]).
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<br><br>
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ibrowse:send_req("http://www.erlang.org", [], head).
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<br><br>
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ibrowse:send_req("http://www.sun.com", [], options).
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<br><br>
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ibrowse:send_req("http://www.bbc.co.uk", [], trace).
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<br><br>
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ibrowse:send_req("http://www.google.com", [], get, [],
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[{stream_to, self()}]).
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</code></p>
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<p>A driver exists which implements URL encoding in C, but the
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speed achieved using only erlang has been good enough, so the
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driver isn't actually used.</p>
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<h2><a name="index">Function Index</a></h2>
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<table width="100%" border="1" cellspacing="0" cellpadding="2" summary="function index"><tr><td valign="top"><a href="#code_change-3">code_change/3</a></td><td></td></tr>
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<tr><td valign="top"><a href="#finished_async_request-0">finished_async_request/0</a></td><td>Internal export.</td></tr>
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<tr><td valign="top"><a href="#handle_call-3">handle_call/3</a></td><td></td></tr>
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<tr><td valign="top"><a href="#handle_cast-2">handle_cast/2</a></td><td></td></tr>
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<tr><td valign="top"><a href="#handle_info-2">handle_info/2</a></td><td></td></tr>
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<tr><td valign="top"><a href="#init-1">init/1</a></td><td></td></tr>
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<tr><td valign="top"><a href="#reply-2">reply/2</a></td><td>Internal export.</td></tr>
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<tr><td valign="top"><a href="#send_req-3">send_req/3</a></td><td>This is the basic function to send a HTTP request.</td></tr>
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<tr><td valign="top"><a href="#send_req-4">send_req/4</a></td><td>Same as send_req/3.</td></tr>
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<tr><td valign="top"><a href="#send_req-5">send_req/5</a></td><td>Same as send_req/4.</td></tr>
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<tr><td valign="top"><a href="#send_req-6">send_req/6</a></td><td>Same as send_req/5.</td></tr>
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<tr><td valign="top"><a href="#set_dest-3">set_dest/3</a></td><td>Sets options for a destination.</td></tr>
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<tr><td valign="top"><a href="#shutting_down-0">shutting_down/0</a></td><td>Internal export.</td></tr>
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<tr><td valign="top"><a href="#start-0">start/0</a></td><td></td></tr>
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<tr><td valign="top"><a href="#start_link-0">start_link/0</a></td><td></td></tr>
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<tr><td valign="top"><a href="#stop-0">stop/0</a></td><td></td></tr>
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<tr><td valign="top"><a href="#terminate-2">terminate/2</a></td><td></td></tr>
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<tr><td valign="top"><a href="#trace_off-0">trace_off/0</a></td><td>Turn tracing off for the ibrowse process.</td></tr>
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<tr><td valign="top"><a href="#trace_off-2">trace_off/2</a></td><td>Turn tracing OFF for all connections to the specified HTTP
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server.</td></tr>
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<tr><td valign="top"><a href="#trace_on-0">trace_on/0</a></td><td>Turn tracing on for the ibrowse process.</td></tr>
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<tr><td valign="top"><a href="#trace_on-2">trace_on/2</a></td><td>Turn tracing on for all connections to the specified HTTP
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server.</td></tr>
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</table>
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<h2><a name="functions">Function Details</a></h2>
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<h3 class="function"><a name="code_change-3">code_change/3</a></h3>
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<div class="spec">
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<p><tt>code_change() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="finished_async_request-0">finished_async_request/0</a></h3>
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<div class="spec">
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<p><tt>finished_async_request() -> term()</tt></p>
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</div><p>Internal export. Called by a HTTP connection process to
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indicate to the load balancing process (ibrowse) that an
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asynchronous request has finished processing.</p>
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<h3 class="function"><a name="handle_call-3">handle_call/3</a></h3>
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<div class="spec">
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<p><tt>handle_call() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="handle_cast-2">handle_cast/2</a></h3>
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<div class="spec">
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<p><tt>handle_cast() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="handle_info-2">handle_info/2</a></h3>
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<div class="spec">
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<p><tt>handle_info() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="init-1">init/1</a></h3>
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<div class="spec">
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<p><tt>init() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="reply-2">reply/2</a></h3>
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<div class="spec">
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<p><tt>reply() -> term()</tt></p>
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</div><p>Internal export. Called by a HTTP connection process to
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indicate to the load balancing process (ibrowse) that a synchronous
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request has finished processing.</p>
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<h3 class="function"><a name="send_req-3">send_req/3</a></h3>
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<div class="spec">
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<p><tt>send_req(Url::string(), Headers::<a href="#type-headerList">headerList()</a>, Method::<a href="#type-method">method()</a>) -> <a href="#type-response">response()</a></tt>
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<ul class="definitions"><li><tt><a name="type-headerList">headerList()</a> = [{<a href="#type-header">header()</a>, <a href="#type-value">value()</a>}]</tt></li>
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<li><tt><a name="type-header">header()</a> = atom() | string()</tt></li>
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<li><tt><a name="type-value">value()</a> = term()</tt></li>
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<li><tt><a name="type-method">method()</a> = get | post | head | options | put | delete | trace | mkcol | propfind | proppatch | lock | unlock | move | copy</tt></li>
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<li><tt>Status = string()</tt></li>
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<li><tt>ResponseHeaders = [<a href="#type-respHeader">respHeader()</a>]</tt></li>
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<li><tt><a name="type-respHeader">respHeader()</a> = {<a href="#type-headerName">headerName()</a>, <a href="#type-headerValue">headerValue()</a>}</tt></li>
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<li><tt><a name="type-headerName">headerName()</a> = string()</tt></li>
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<li><tt><a name="type-headerValue">headerValue()</a> = string()</tt></li>
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<li><tt><a name="type-response">response()</a> = {ok, Status, ResponseHeaders, ResponseBody} | {error, Reason}</tt></li>
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<li><tt>ResponseBody = string() | {file, Filename}</tt></li>
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<li><tt>Reason = term()</tt></li>
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</ul></p>
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</div><p>This is the basic function to send a HTTP request.
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The Status return value indicates the HTTP status code returned by the webserver</p>
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<h3 class="function"><a name="send_req-4">send_req/4</a></h3>
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<div class="spec">
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<p><tt>send_req(Url, Headers, Method::<a href="#type-method">method()</a>, Body::<a href="#type-body">body()</a>) -> <a href="#type-response">response()</a></tt>
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<ul class="definitions"><li><tt><a name="type-body">body()</a> = [] | string() | binary()</tt></li>
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</ul></p>
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</div><p>Same as send_req/3.
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If a list is specified for the body it has to be a flat list.</p>
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<h3 class="function"><a name="send_req-5">send_req/5</a></h3>
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<div class="spec">
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<p><tt>send_req(Url::string(), Headers::<a href="#type-headerList">headerList()</a>, Method::<a href="#type-method">method()</a>, Body::<a href="#type-body">body()</a>, Options::<a href="#type-optionList">optionList()</a>) -> <a href="#type-response">response()</a></tt>
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<ul class="definitions"><li><tt><a name="type-optionList">optionList()</a> = [<a href="#type-option">option()</a>]</tt></li>
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<li><tt><a name="type-option">option()</a> = {max_sessions, integer()} | {max_pipeline_size, integer()} | {trace, <a href="#type-boolean">boolean()</a>} | {is_ssl, <a href="#type-boolean">boolean()</a>} | {ssl_options, [SSLOpt]} | {pool_name, atom()} | {proxy_host, string()} | {proxy_port, integer()} | {proxy_user, string()} | {proxy_password, string()} | {use_absolute_uri, <a href="#type-boolean">boolean()</a>} | {basic_auth, {<a href="#type-username">username()</a>, <a href="#type-password">password()</a>}} | {cookie, string()} | {content_length, integer()} | {content_type, string()} | {save_response_to_file, <a href="#type-srtf">srtf()</a>} | {stream_to, <a href="#type-process">process()</a>} | {http_vsn, {MajorVsn, MinorVsn}} | {host_header, string()} | {transfer_encoding, {chunked, ChunkSize}}</tt></li>
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<li><tt><a name="type-process">process()</a> = pid() | atom()</tt></li>
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<li><tt><a name="type-username">username()</a> = string()</tt></li>
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<li><tt><a name="type-password">password()</a> = string()</tt></li>
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<li><tt>SSLOpt = term()</tt></li>
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<li><tt>ChunkSize = integer()</tt></li>
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<li><tt><a name="type-srtf">srtf()</a> = <a href="#type-boolean">boolean()</a> | <a href="#type-filename">filename()</a></tt></li>
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<li><tt><a name="type-filename">filename()</a> = string()</tt></li>
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</ul></p>
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</div><p>Same as send_req/4.
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For a description of SSL Options, look in the ssl manpage. If the
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HTTP Version to use is not specified, the default is 1.1.
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<br>
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<p>The <code>host_header</code> is useful in the case where ibrowse is
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connecting to a component such as <a href="http://www.stunnel.org">stunnel</a> which then sets up a
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secure connection to a webserver. In this case, the URL supplied to
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ibrowse must have the stunnel host/port details, but that won't
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make sense to the destination webserver. This option can then be
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used to specify what should go in the <code>Host</code> header in
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the request.</p>
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<ul>
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<li>When both the options <code>save_response_to_file</code> and <code>stream_to</code>
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are specified, the former takes precedence.</li>
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<li>For the <code>save_response_to_file</code> option, the response body is saved to
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file only if the status code is in the 200-299 range. If not, the response body is returned
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as a string.</li>
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<li>Whenever an error occurs in the processing of a request, ibrowse will return as much
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information as it has, such as HTTP Status Code and HTTP Headers. When this happens, the response
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is of the form <code>{error, {Reason, {stat_code, StatusCode}, HTTP_headers}}</code></li>
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</ul></p>
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<h3 class="function"><a name="send_req-6">send_req/6</a></h3>
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<div class="spec">
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<p><tt>send_req(Url, Headers::<a href="#type-headerList">headerList()</a>, Method::<a href="#type-method">method()</a>, Body::<a href="#type-body">body()</a>, Options::<a href="#type-optionList">optionList()</a>, Timeout) -> <a href="#type-response">response()</a></tt>
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<ul class="definitions"><li><tt>Timeout = integer() | infinity</tt></li>
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</ul></p>
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</div><p>Same as send_req/5.
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All timeout values are in milliseconds.</p>
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<h3 class="function"><a name="set_dest-3">set_dest/3</a></h3>
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<div class="spec">
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<p><tt>set_dest(Host::string(), Port::integer(), Opts::<a href="#type-opt_list">opt_list()</a>) -> ok</tt>
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<ul class="definitions"><li><tt><a name="type-opt_list">opt_list()</a> = [opt]</tt></li>
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<li><tt><a name="type-opt">opt()</a> = {max_sessions, integer()} | {max_pipeline_size, integer()} | {trace, <a href="#type-boolean">boolean()</a>}</tt></li>
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</ul></p>
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</div><p>Sets options for a destination. If the options have not been
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set in the ibrowse.conf file, it can be set using this function
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before sending the first request to the destination. If not,
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defaults will be used. Entries in ibrowse.conf look like this.
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<code><br>
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{dest, Host, Port, MaxSess, MaxPipe, Options}.<br>
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where <br>
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Host = string(). "www.erlang.org" | "193.180.168.23"<br>
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Port = integer()<br>
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MaxSess = integer()<br>
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MaxPipe = integer()<br>
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Options = optionList() -- see options in send_req/5<br>
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</code></p>
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<h3 class="function"><a name="shutting_down-0">shutting_down/0</a></h3>
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<div class="spec">
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<p><tt>shutting_down() -> term()</tt></p>
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</div><p>Internal export. Called by a HTTP connection process to
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indicate to ibrowse that it is shutting down and further requests
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should not be sent it's way.</p>
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<h3 class="function"><a name="start-0">start/0</a></h3>
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<div class="spec">
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<p><tt>start() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="start_link-0">start_link/0</a></h3>
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<div class="spec">
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<p><tt>start_link() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="stop-0">stop/0</a></h3>
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<div class="spec">
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<p><tt>stop() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="terminate-2">terminate/2</a></h3>
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<div class="spec">
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<p><tt>terminate() -> term()</tt></p>
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</div>
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<h3 class="function"><a name="trace_off-0">trace_off/0</a></h3>
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<div class="spec">
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<p><tt>trace_off() -> term()</tt></p>
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</div><p>Turn tracing off for the ibrowse process</p>
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<h3 class="function"><a name="trace_off-2">trace_off/2</a></h3>
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<div class="spec">
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<p><tt>trace_off(Host, Port) -> term()</tt></p>
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</div><p>Turn tracing OFF for all connections to the specified HTTP
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server.</p>
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<h3 class="function"><a name="trace_on-0">trace_on/0</a></h3>
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<div class="spec">
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<p><tt>trace_on() -> term()</tt></p>
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</div><p>Turn tracing on for the ibrowse process</p>
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<h3 class="function"><a name="trace_on-2">trace_on/2</a></h3>
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<div class="spec">
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<p><tt>trace_on(Host, Port) -> term()</tt>
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<ul class="definitions"><li><tt>Host = string()</tt></li>
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<li><tt>Port = integer()</tt></li>
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</ul></p>
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</div><p>Turn tracing on for all connections to the specified HTTP
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server. Host is whatever is specified as the domain name in the URL</p>
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<hr>
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<div class="navbar"><a name="#navbar_bottom"></a><table width="100%" border="0" cellspacing="0" cellpadding="2" summary="navigation bar"><tr><td><a href="overview-summary.html" target="overviewFrame">Overview</a></td><td><a href="http://www.erlang.org/"><img src="erlang.png" align="right" border="0" alt="erlang logo"></a></td></tr></table></div>
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<p><i>Generated by EDoc, Feb 7 2008, 11:49:30.</i></p>
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</body>
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</html>
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