nodejs和强大的标头错误

Question

nodejs和强大的标头错误

我无法调试此问题或在线查找解决方案.Node.js的新手,希望有人能提供解决方案

错误:更新了控制台日志信息2012年2月11日星期六上午7:27:17

Request for/ received!
About to route a request for /
Request handler 'start' was called.
Request for/favicon.ico received!
About to route a request for /favicon.ico
No request handler found for /favicon.ico
Request for/favicon.ico received!
About to route a request for /favicon.ico
No request handler found for /favicon.ico
Request for/upload received!
About to route a request for /upload
Request handler 'upload' was called.
about to parse
{ output: [],
  outputEncodings: [],
  writable: true,
  _last: false,
  chunkedEncoding: false,
  shouldKeepAlive: true,
  useChunkedEncodingByDefault: true,
  _hasBody: true,
  _trailer: '',
  finished: false,
  socket: 
   { _handle: 
      { writeQueueSize: 0,
        socket: [Circular],
        onread: [Function: onread] },
     _pendingWriteReqs: 0,
     _flags: 0,
     _connectQueueSize: 0,
     destroyed: false,
     bytesRead: 66509,
     bytesWritten: 638,
     allowHalfOpen: true,
     writable: true,
     readable: true,
     server: 
      { connections: 1,
        allowHalfOpen: true,
        _handle: [Object],
        _events: [Object],
        httpAllowHalfOpen: false },
     ondrain: [Function],
     _idleTimeout: 120000,
     _idleNext: 
      { _idleNext: [Circular],
        _idlePrev: [Circular],
        ontimeout: [Function] },
     _idlePrev: 
      { _idleNext: [Circular],
        _idlePrev: [Circular],
        ontimeout: [Function] },
     _idleStart: Sat, 11 Feb 2012 15:25:28 GMT,
     _events: { timeout: [Function], error: [Function], close: [Object] },
     ondata: [Function],
     onend: [Function],
     _httpMessage: [Circular] },
  connection: 
   { _handle: 
      { writeQueueSize: 0,
        socket: [Circular],
        onread: [Function: onread] },
     _pendingWriteReqs: 0,
     _flags: 0,
     _connectQueueSize: 0,
     destroyed: false,
     bytesRead: 66509,
     bytesWritten: 638,
     allowHalfOpen: true,
     writable: true,
     readable: true,
     server: 
      { connections: 1,
        allowHalfOpen: true,
        _handle: [Object],
        _events: [Object],
        httpAllowHalfOpen: false },
     ondrain: [Function],
     _idleTimeout: 120000,
     _idleNext: 
      { _idleNext: [Circular],
        _idlePrev: [Circular],
        ontimeout: [Function] },
     _idlePrev: 
      { _idleNext: [Circular],
        _idlePrev: [Circular],
        ontimeout: [Function] },
     _idleStart: Sat, 11 Feb 2012 15:25:28 GMT,
     _events: { timeout: [Function], error: [Function], close: [Object] },
     ondata: [Function],
     onend: [Function],
     _httpMessage: [Circular] },
  _events: { finish: [Function] } }

/usr/local/lib/node_modules/formidable/lib/incoming_form.js:247

undefined
  if (this.headers['content-length']) {
                  ^

TypeError: Cannot read property 'content-length' of undefined
    at IncomingForm._parseContentLength (/usr/local/lib/node_modules/formidable/lib/incoming_form.js:247:19)
    at IncomingForm.writeHeaders (/usr/local/lib/node_modules/formidable/lib/incoming_form.js:126:8)
    at IncomingForm.parse (/usr/local/lib/node_modules/formidable/lib/incoming_form.js:80:8)
    at Object.upload [as /upload] (/Applications/MAMP/htdocs3/js/nodejs/webapp/requestHandlers.js:34:8)
    at route (/Applications/MAMP/htdocs3/js/nodejs/webapp/router.js:4:20)
    at Server.onRequest (/Applications/MAMP/htdocs3/js/nodejs/webapp/server.js:20:3)
    at Server.emit (events.js:70:17)
    at HTTPParser.onIncoming (http.js:1511:12)
    at HTTPParser.onHeadersComplete (http.js:102:31)
    at Socket.ondata (http.js:1407:22)

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结束错误

requestHandlers.js

var querystring = require("querystring"),
    fs = require("fs"),
    formidable = require("formidable");

function start(response) {
  console.log("Request handler 'start' was called.");

  var body = '<html>'+
    '<head>'+
    '<meta http-equiv="Content-Type" '+
    'content="text/html; charset=UTF-8" />'+
    '</head>'+
    '<body>'+
    '<form action="/upload" enctype="multipart/form-data" '+
    'method="post">'+
    '<input type="file" name="upload" multiple="multiple">'+
    '<input type="submit" value="Upload file" />'+
    '</form>'+
    '</body>'+
    '</html>';

    response.writeHead(200, {"Content-Type": "text/html"});
    response.write(body);
    response.end();
}

function upload(response, request) {
  console.log("Request handler 'upload' was called.");

  var form = new formidable.IncomingForm();
  console.log("about to parse");
  form.parse(request, function(error, fields, files) {
    console.log("parsing done");

    /*
     * Some systems [Windows] raise an error when you attempt to rename new file into one that already exists.
     * This call deletes the previous .PNG image prior to renaming the new one in its place.
    */
    fs.unlinkSync(__dirname +"/tmp/test.jpg");
    fs.renameSync(files.upload.path, "/tmp/test.jpg");
    response.writeHead(200, {"Content-Type": "text/html"});
    response.write("received image:<br/>");
    response.write("<img src='/show' />");
    response.end();
  });
}

function show(response) {
  console.log("Request handler 'show' was called.");
  fs.readFile(__dirname + "/tmp/test.jpg", "binary", function(error, file) {
    if(error) {
      response.writeHead(500, {"Content-Type": "text/plain"});
      response.write(error + "\n");
      response.end();
    } else {
      response.writeHead(200, {"Content-Type": "image/jpg"});
      response.write(file, "binary");
      response.end();
    }
  });
}

exports.start = start;
exports.upload = upload;
exports.show = show;

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index.js

var server = require("./server");
var router = require("./router");
var requestHandlers = require("./requestHandlers");

var handle = {}
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;
handle["/show"] = requestHandlers.show;

server.start(router.route, handle);

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router.js

function route(handle, pathname, response, request) {
  console.log("About to route a request for " + pathname);
  if (typeof handle[pathname] === 'function') {
    handle[pathname](response, request);
  } else {
    console.log("No request handler found for " + pathname);
    response.writeHead(404, {"Content-Type": "text/html"});
    response.write("404 Not found");
    response.end();
  }
}

exports.route = route;

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server.js

var http = require("http");
var url = require("url");

function start(route, handle) {
  function onRequest(request, response) {
    var pathname = url.parse(request.url).pathname;
    console.log("Request for " + pathname + " received.");
    route(handle, pathname, response, request);
  }

  // http.createServer(onRequest).listen(8888);
  //  console.log("Server has started.");
    http.createServer(onRequest).listen(1337, "127.0.0.1");
    console.log('Server Has Started!');
}

exports.start = start;

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Answer 1

小智 0

对于它的价值，上面的代码对我有用。

问题似乎发生在令人生畏的地方。检查node_modules中的package.json，我在node -v= v0.4.12上使用版本1.0.8。

您发出的浏览器或请求似乎未在请求中包含内容长度标头。我使用的是 Chrome，但如果您使用 CURL 或者异步或作为流发出请求，则请求中可能没有内容长度标头，从而导致此问题。这里对此进行了一些讨论： https ://github.com/felixge/node-formidable/issues/93

在我看来，formidable 应该正确检查参数是否存在（typeof(this.headers['content-length']) != undefined）。如果您确定您的浏览器和您尝试上传的文件类型，这会对其他人有所帮助，然后您可以在https://github.com/felixge/node-formidable/上提交错误

注意：您还可以将此问题的标题更新为nodejsnot nodjs。祝节点好运！

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