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The LowLevelServer is a direct interface to the parser given people access to things like partially received headers. This could be used to implement an extremely optimized server which acts before parsing is complete. Most people will be using node.http.Server which is still rather low-level compared to other http interfaces, but does take care of some details for you.v0.7.4-release
Ryan
16 years ago
3 changed files with 202 additions and 127 deletions
@ -1,25 +1,121 @@ |
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node.http = { |
/* This is a wrapper around the LowLevelServer interface. It provides |
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fillField : function (msg, field, data) { |
* connection handling, overflow checking, and some data buffering. |
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msg[field] = (msg[field] || "") + data; |
*/ |
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}, |
node.http.Server = function (RequestHandler, options) { |
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var MAX_FIELD_SIZE = 80*1024; |
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appendHeaderField : function (msg, data) { |
function Protocol (connection) { |
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if (msg.hasOwnProperty("headers")) { |
function fillField (field, data) { |
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var last_pair = msg.headers[msg.headers.length-1]; |
field = (field || "") + data; |
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if (last_pair.length == 1) |
if (field.length > MAX_FIELD_SIZE) { |
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last_pair[0] += data; |
connection.fullClose(); |
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else |
return false; |
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msg.headers.push([data]); |
} |
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} else { |
return true; |
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msg.headers = [[data]]; |
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} |
} |
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}, |
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var responses = []; |
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appendHeaderValue : function (msg, data) { |
function Response () { |
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var last_pair = msg.headers[msg.headers.length-1]; |
responses.push(this); |
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if (last_pair.length == 1) |
/* This annoying output buisness is necessary for the case that users |
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last_pair[1] = data; |
* are writing to responses out of order! HTTP requires that responses |
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else |
* are returned in the same order the requests come. |
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last_pair[1] += data; |
*/ |
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var output = ""; |
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this.output = output; |
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function send (data) { |
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if (responses[0] === this) { |
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connection.send(data); |
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} else { |
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output += data; |
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} |
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}; |
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this.sendStatus = function (status, reason) { |
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output += "HTTP/1.1 " + status.toString() + " " + reason + "\r\n"; |
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}; |
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this.sendHeader = function (field, value) { |
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output += field + ": " + value.toString() + "\r\n"; |
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}; |
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var headersSent = false; |
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this.sendBody = function (chunk) { |
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if (headersSent === false) { |
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output += "\r\n"; |
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} |
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output += chunk; |
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if (responses[0] === this) { |
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connection.send(output); |
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output = ""; |
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} |
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}; |
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var finished = false; |
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this.finish = function () { |
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this.finished = true; |
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while (responses.length > 0 && responses[0].finished) { |
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var res = responses.shift(); |
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connection.send(res.output); |
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} |
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if (responses.length == 0) { |
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connection.fullClose(); |
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// TODO keep-alive logic
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// if http/1.0 without "Connection: keep-alive" header - yes
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// if http/1.1 if the request was not GET or HEAD - yes
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// if http/1.1 without "Connection: close" header - yes
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} |
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}; |
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} |
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this.onMessage = function ( ) { |
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var res = new Response(); |
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var req = new RequestHandler(res); |
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this.encoding = req.encoding || "raw"; |
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this.onPath = function (data) { return fillField(req.path, data); }; |
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this.onURI = function (data) { return fillField(req.uri, data); }; |
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this.onQueryString = function (data) { return fillField(req.query_string, data); }; |
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this.onFragment = function (data) { return fillField(req.fragment, data); }; |
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this.onHeaderField = function (data) { |
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if (req.hasOwnProperty("headers")) { |
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var last_pair = req.headers[req.headers.length-1]; |
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if (last_pair.length == 1) |
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return fillField(last_pair[0], data); |
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else |
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req.headers.push([data]); |
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} else { |
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req.headers = [[data]]; |
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} |
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return true; |
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}; |
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this.onHeaderValue = function (data) { |
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var last_pair = req.headers[req.headers.length-1]; |
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if (last_pair.length == 1) |
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last_pair[1] = data; |
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else |
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return fillField(last_pair[1], data); |
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return true; |
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}; |
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this.onHeadersComplete = function () { |
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req.http_version = this.http_version; |
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req.method = this.method; |
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return req.onHeadersComplete(); |
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}; |
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this.onBody = function (chunk) { return req.onBody(chunk); }; |
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this.onBodyComplete = function () { return req.onBodyComplete(); }; |
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}; |
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} |
} |
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var server = new node.http.LowLevelServer(Protocol, options); |
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this.listen = function (port, host) { server.listen(port, host); } |
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this.close = function () { server.close(); } |
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}; |
}; |
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