expressjs服务器http请求返回空响应

Question

我为此挠头。

我是expressjs的新手，现在我正在开发一个网站，作为代理从其他包裹网站获取数据。

这是我从邮递员那里得到的。

对此屏幕截图加灯：

1. request方法通过两个url参数获取
2. 显示请求标头（共6个）
3. 响应在响应字段中显示为html页面，状态码为200

为了模仿上述要求的行为，我创建了以下expresssjs代码：

    'use strict';
var http = require("http");
//var https = require("https");



exports.fetchPackageFromWeb = function (req, res, next) {
    //res.send('hello world');
    //fetch package info
    console.log('-------------1');
    let pGuid = req.query.pGuid;
    console.log('pGuid::' + pGuid);

    var optDic = {
        'auexpress': {
            host: 'www.auexpress.com.au',
            path: `/TOrderQuery_Service.aspx?OrderId=${pGuid}`,
        },
        'chs': {
            host: 'www.zhonghuan.com.au',
            path: `clientController.do?getlogisticsDetail&parcelNo=${pGuid}`,
        }
    }


    console.log('-------------2');
    var options = {
        host: optDic[req.query.company].host,
        path: optDic[req.query.company].path,
        method: 'GET',
        headers: {
            'Upgrade-Insecure-Requests' : '1'
            ,'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36'
            ,'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
            , 'Accept-Encoding': 'gzip, deflate, sdch'          
            , 'Accept-Language': 'en-AU,en;q=0.8,en-US;q=0.6'
            ,'Cookie' : 'JSESSIONID=5D11F26C0B41F60481C2426623C197B5'  

        }
    };
    console.log(options);

    var port =  http;

    var InnerReq = port.request(options, function (innerRes) {
        var output = '';
        console.log('-------------3');
        //console.log(options.host + ':' + innerRes.statusCode);
        //innerRes.setEncoding('utf8');
        console.log('--------------------------start res');
        //console.log(innerRes);

        innerRes.on('data', function (chunk) {
            output += chunk;
        });

        innerRes.on('end', function () {
            console.log('-------------4');
            console.log('output::' + output);
            console.log('innerRes::')
            console.log(innerRes);
            res.send(output)
        });
    });

    InnerReq.on('error', function (err) {
        //res.send('error: ' + err.message);
        console.log(err);
    });

    InnerReq.end();
}

以下是调试输出：

-------------1
pGuid::900016077939
-------------2 (Request Option)
{ host: 'www.zhonghuan.com.au',
  path: 'clientController.do?getlogisticsDetail&parcelNo=900016077939',
  method: 'GET',
  headers: 
   { 'Upgrade-Insecure-Requests': '1',
     'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36',
     Accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
     'Accept-Encoding': 'gzip, deflate, sdch',
     'Accept-Language': 'en-AU,en;q=0.8,en-US;q=0.6',
     Cookie: 'JSESSIONID=5D11F26C0B41F60481C2426623C197B5' } }
  express:router dispatching GET /static/images/cmp_logo_chs.png +58ms
  express:router query  : /static/images/cmp_logo_chs.png +0ms
  express:router expressInit  : /static/images/cmp_logo_chs.png +0ms
  express:router jsonParser  : /static/images/cmp_logo_chs.png +0ms
  express:router serveStatic  : /static/images/cmp_logo_chs.png +0ms
  express:router dispatching GET /fonts/glyphicons-halflings-regular.woff2 +1ms
  express:router query  : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router expressInit  : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router jsonParser  : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router serveStatic  : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router dispatching GET /favicon.ico +0ms
  express:router query  : /favicon.ico +0ms
  express:router expressInit  : /favicon.ico +6ms
  express:router jsonParser  : /favicon.ico +0ms
  express:router serveStatic  : /favicon.ico +0ms
  express:router <anonymous>  : /static/images/cmp_logo_chs.png +0ms
  express:router serveStatic  : /static/images/cmp_logo_chs.png +0ms
  express:router <anonymous>  : /fonts/glyphicons-halflings-regular.woff2 +3ms
  express:router serveStatic  : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router <anonymous>  : /favicon.ico +7ms
  express:router serveStatic  : /favicon.ico +0ms
  express:router trim prefix (/static) from url /static/images/cmp_logo_chs.png +0ms
  express:router serveStatic /static : /static/images/cmp_logo_chs.png +0ms
  express:router trim prefix (/fonts) from url /fonts/glyphicons-halflings-regular.woff2 +1ms
  express:router serveStatic /fonts : /fonts/glyphicons-halflings-regular.woff2 +0ms
  express:router trim prefix (/favicon.ico) from url /favicon.ico +1ms
  express:router <anonymous> /favicon.ico : /favicon.ico +0ms
-------------3
--------------------------start res
-------------4
output::
innerRes::
IncomingMessage {
  _readableState: 
   ReadableState {
     objectMode: false,
     highWaterMark: 16384,
     buffer: [],
     length: 0,
     pipes: null,
     pipesCount: 0,
     flowing: true,
     ended: true,
     endEmitted: true,
     reading: false,
     sync: true,
     needReadable: false,
     emittedReadable: false,
     readableListening: false,
     defaultEncoding: 'utf8',
     ranOut: false,
     awaitDrain: 0,
     readingMore: false,
     decoder: null,
     encoding: null,
     resumeScheduled: false },
  readable: false,
  domain: null,
  _events: 
   { end: [ [Function: responseOnEnd], [Function] ],
     data: [Function] },
  _eventsCount: 2,
  _maxListeners: undefined,
  socket: 
   Socket {
     _connecting: false,
     _hadError: false,
     _handle: null,
     _parent: null,
     _host: 'www.zhonghuan.com.au',
     _readableState: 
      ReadableState {
        objectMode: false,
        highWaterMark: 16384,
        buffer: [],
        length: 0,
        pipes: null,
        pipesCount: 0,
        flowing: true,
        ended: false,
        endEmitted: false,
        reading: true,
        sync: false,
        needReadable: true,
        emittedReadable: false,
        readableListening: false,
        defaultEncoding: 'utf8',
        ranOut: false,
        awaitDrain: 0,
        readingMore: false,
        decoder: null,
        encoding: null,
        resumeScheduled: false },
     readable: false,
     domain: null,
     _events: 
      { end: [Object],
        finish: [Function: onSocketFinish],
        _socketEnd: [Function: onSocketEnd],
        free: [Function: onFree],
        close: [Object],
        agentRemove: [Function: onRemove],
        drain: [Function: ondrain],
        error: [Function: socketErrorListener] },
     _eventsCount: 8,
     _maxListeners: undefined,
     _writableState: 
      WritableState {
        objectMode: false,
        highWaterMark: 16384,
        needDrain: false,
        ending: true,
        ended: true,
        finished: true,
        decodeStrings: false,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        corked: 0,
        sync: false,
        bufferProcessing: false,
        onwrite: [Function],
        writecb: null,
        writelen: 0,
        bufferedRequest: null,
        lastBufferedRequest: null,
        pendingcb: 0,
        prefinished: true,
        errorEmitted: false },
     writable: false,
     allowHalfOpen: false,
     destroyed: true,
     bytesRead: 130,
     _bytesDispatched: 509,
     _sockname: null,
     _pendingData: null,
     _pendingEncoding: '',
     parser: null,
     _httpMessage: 
      ClientRequest {
        domain: null,
        _events: [Object],
        _eventsCount: 1,
        _maxListeners: undefined,
        output: [],
        outputEncodings: [],
        outputCallbacks: [],
        outputSize: 0,
        writable: true,
        _last: true,
        chunkedEncoding: false,
        shouldKeepAlive: false,
        useChunkedEncodingByDefault: false,
        sendDate: false,
        _removedHeader: {},
        _contentLength: 0,
        _hasBody: true,
        _trailer: '',
        finished: true,
        _headerSent: true,
        socket: [Circular],
        connection: [Circular],
        _header: 'GET clientController.do?getlogisticsDetail&parcelNo=900016077939 HTTP/1.1\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\nAccept-Encoding: gzip, deflate, sdch\r\nAccept-Language: en-AU,en;q=0.8,en-US;q=0.6\r\nCookie: JSESSIONID=5D11F26C0B41F60481C2426623C197B5\r\nHost: www.zhonghuan.com.au\r\nConnection: close\r\n\r\n',
        _headers: [Object],
        _headerNames: [Object],
        _onPendingData: null,
        agent: [Object],
        socketPath: undefined,
        method: 'GET',
        path: 'clientController.do?getlogisticsDetail&parcelNo=900016077939',
        parser: null,
        res: [Circular] },
     read: [Function],
     _consuming: true,
     _idleNext: null,
     _idlePrev: null,
     _idleTimeout: -1 },
  connection: 
   Socket {
     _connecting: false,
     _hadError: false,
     _handle: null,
     _parent: null,
     _host: 'www.zhonghuan.com.au',
     _readableState: 
      ReadableState {
        objectMode: false,
        highWaterMark: 16384,
        buffer: [],
        length: 0,
        pipes: null,
        pipesCount: 0,
        flowing: true,
        ended: false,
        endEmitted: false,
        reading: true,
        sync: false,
        needReadable: true,
        emittedReadable: false,
        readableListening: false,
        defaultEncoding: 'utf8',
        ranOut: false,
        awaitDrain: 0,
        readingMore: false,
        decoder: null,
        encoding: null,
        resumeScheduled: false },
     readable: false,
     domain: null,
     _events: 
      { end: [Object],
        finish: [Function: onSocketFinish],
        _socketEnd: [Function: onSocketEnd],
        free: [Function: onFree],
        close: [Object],
        agentRemove: [Function: onRemove],
        drain: [Function: ondrain],
        error: [Function: socketErrorListener] },
     _eventsCount: 8,
     _maxListeners: undefined,
     _writableState: 
      WritableState {
        objectMode: false,
        highWaterMark: 16384,
        needDrain: false,
        ending: true,
        ended: true,
        finished: true,
        decodeStrings: false,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        corked: 0,
        sync: false,
        bufferProcessing: false,
        onwrite: [Function],
        writecb: null,
        writelen: 0,
        bufferedRequest: null,
        lastBufferedRequest: null,
        pendingcb: 0,
        prefinished: true,
        errorEmitted: false },
     writable: false,
     allowHalfOpen: false,
     destroyed: true,
     bytesRead: 130,
     _bytesDispatched: 509,
     _sockname: null,
     _pendingData: null,
     _pendingEncoding: '',
     parser: null,
     _httpMessage: 
      ClientRequest {
        domain: null,
        _events: [Object],
        _eventsCount: 1,
        _maxListeners: undefined,
        output: [],
        outputEncodings: [],
        outputCallbacks: [],
        outputSize: 0,
        writable: true,
        _last: true,
        chunkedEncoding: false,
        shouldKeepAlive: false,
        useChunkedEncodingByDefault: false,
        sendDate: false,
        _removedHeader: {},
        _contentLength: 0,
        _hasBody: true,
        _trailer: '',
        finished: true,
        _headerSent: true,
        socket: [Circular],
        connection: [Circular],
        _header: 'GET clientController.do?getlogisticsDetail&parcelNo=900016077939 HTTP/1.1\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\nAccept-Encoding: gzip, deflate, sdch\r\nAccept-Language: en-AU,en;q=0.8,en-US;q=0.6\r\nCookie: JSESSIONID=5D11F26C0B41F60481C2426623C197B5\r\nHost: www.zhonghuan.com.au\r\nConnection: close\r\n\r\n',
        _headers: [Object],
        _headerNames: [Object],
        _onPendingData: null,
        agent: [Object],
        socketPath: undefined,
        method: 'GET',
        path: 'clientController.do?getlogisticsDetail&parcelNo=900016077939',
        parser: null,
        res: [Circular] },
     read: [Function],
     _consuming: true,
     _idleNext: null,
     _idlePrev: null,
     _idleTimeout: -1 },
  httpVersionMajor: 1,
  httpVersionMinor: 1,
  httpVersion: '1.1',
  complete: true,
  headers: 
   { server: 'Apache-Coyote/1.1',
     'content-length': '0',
     date: 'Mon, 05 Sep 2016 14:34:27 GMT',
     connection: 'close' },
  rawHeaders: 
   [ 'Server',
     'Apache-Coyote/1.1',
     'Content-Length',
     '0',
     'Date',
     'Mon, 05 Sep 2016 14:34:27 GMT',
     'Connection',
     'close' ],
  trailers: {},
  rawTrailers: [],
  upgrade: false,
  url: '',
  method: null,
  statusCode: 400,
  statusMessage: 'Bad Request',
  client: 
   Socket {
     _connecting: false,
     _hadError: false,
     _handle: null,
     _parent: null,
     _host: 'www.zhonghuan.com.au',
     _readableState: 
      ReadableState {
        objectMode: false,
        highWaterMark: 16384,
        buffer: [],
        length: 0,
        pipes: null,
        pipesCount: 0,
        flowing: true,
        ended: false,
        endEmitted: false,
        reading: true,
        sync: false,
        needReadable: true,
        emittedReadable: false,
        readableListening: false,
        defaultEncoding: 'utf8',
        ranOut: false,
        awaitDrain: 0,
        readingMore: false,
        decoder: null,
        encoding: null,
        resumeScheduled: false },
     readable: false,
     domain: null,
     _events: 
      { end: [Object],
        finish: [Function: onSocketFinish],
        _socketEnd: [Function: onSocketEnd],
        free: [Function: onFree],
        close: [Object],
        agentRemove: [Function: onRemove],
        drain: [Function: ondrain],
        error: [Function: socketErrorListener] },
     _eventsCount: 8,
     _maxListeners: undefined,
     _writableState: 
      WritableState {
        objectMode: false,
        highWaterMark: 16384,
        needDrain: false,
        ending: true,
        ended: true,
        finished: true,
        decodeStrings: false,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        corked: 0,
        sync: false,
        bufferProcessing: false,
        onwrite: [Function],
        writecb: null,
        writelen: 0,
        bufferedRequest: null,
        lastBufferedRequest: null,
        pendingcb: 0,
        prefinished: true,
        errorEmitted: false },
     writable: false,
     allowHalfOpen: false,
     destroyed: true,
     bytesRead: 130,
     _bytesDispatched: 509,
     _sockname: null,
     _pendingData: null,
     _pendingEncoding: '',
     parser: null,
     _httpMessage: 
      ClientRequest {
        domain: null,
        _events: [Object],
        _eventsCount: 1,
        _maxListeners: undefined,
        output: [],
        outputEncodings: [],
        outputCallbacks: [],
        outputSize: 0,
        writable: true,
        _last: true,
        chunkedEncoding: false,
        shouldKeepAlive: false,
        useChunkedEncodingByDefault: false,
        sendDate: false,
        _removedHeader: {},
        _contentLength: 0,
        _hasBody: true,
        _trailer: '',
        finished: true,
        _headerSent: true,
        socket: [Circular],
        connection: [Circular],
        _header: 'GET clientController.do?getlogisticsDetail&parcelNo=900016077939 HTTP/1.1\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\nAccept-Encoding: gzip, deflate, sdch\r\nAccept-Language: en-AU,en;q=0.8,en-US;q=0.6\r\nCookie: JSESSIONID=5D11F26C0B41F60481C2426623C197B5\r\nHost: www.zhonghuan.com.au\r\nConnection: close\r\n\r\n',
        _headers: [Object],
        _headerNames: [Object],
        _onPendingData: null,
        agent: [Object],
        socketPath: undefined,
        method: 'GET',
        path: 'clientController.do?getlogisticsDetail&parcelNo=900016077939',
        parser: null,
        res: [Circular] },
     read: [Function],
     _consuming: true,
     _idleNext: null,
     _idlePrev: null,
     _idleTimeout: -1 },
  _consuming: true,
  _dumped: false,
  req: 
   ClientRequest {
     domain: null,
     _events: { error: [Function] },
     _eventsCount: 1,
     _maxListeners: undefined,
     output: [],
     outputEncodings: [],
     outputCallbacks: [],
     outputSize: 0,
     writable: true,
     _last: true,
     chunkedEncoding: false,
     shouldKeepAlive: false,
     useChunkedEncodingByDefault: false,
     sendDate: false,
     _removedHeader: {},
     _contentLength: 0,
     _hasBody: true,
     _trailer: '',
     finished: true,
     _headerSent: true,
     socket: 
      Socket {
        _connecting: false,
        _hadError: false,
        _handle: null,
        _parent: null,
        _host: 'www.zhonghuan.com.au',
        _readableState: [Object],
        readable: false,
        domain: null,
        _events: [Object],
        _eventsCount: 8,
        _maxListeners: undefined,
        _writableState: [Object],
        writable: false,
        allowHalfOpen: false,
        destroyed: true,
        bytesRead: 130,
        _bytesDispatched: 509,
        _sockname: null,
        _pendingData: null,
        _pendingEncoding: '',
        parser: null,
        _httpMessage: [Circular],
        read: [Function],
        _consuming: true,
        _idleNext: null,
        _idlePrev: null,
        _idleTimeout: -1 },
     connection: 
      Socket {
        _connecting: false,
        _hadError: false,
        _handle: null,
        _parent: null,
        _host: 'www.zhonghuan.com.au',
        _readableState: [Object],
        readable: false,
        domain: null,
        _events: [Object],
        _eventsCount: 8,
        _maxListeners: undefined,
        _writableState: [Object],
        writable: false,
        allowHalfOpen: false,
        destroyed: true,
        bytesRead: 130,
        _bytesDispatched: 509,
        _sockname: null,
        _pendingData: null,
        _pendingEncoding: '',
        parser: null,
        _httpMessage: [Circular],
        read: [Function],
        _consuming: true,
        _idleNext: null,
        _idlePrev: null,
        _idleTimeout: -1 },
     _header: 'GET clientController.do?getlogisticsDetail&parcelNo=900016077939 HTTP/1.1\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\nAccept-Encoding: gzip, deflate, sdch\r\nAccept-Language: en-AU,en;q=0.8,en-US;q=0.6\r\nCookie: JSESSIONID=5D11F26C0B41F60481C2426623C197B5\r\nHost: www.zhonghuan.com.au\r\nConnection: close\r\n\r\n',
     _headers: 
      { 'upgrade-insecure-requests': '1',
        'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36',
        accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
        'accept-encoding': 'gzip, deflate, sdch',
        'accept-language': 'en-AU,en;q=0.8,en-US;q=0.6',
        cookie: 'JSESSIONID=5D11F26C0B41F60481C2426623C197B5',
        host: 'www.zhonghuan.com.au' },
     _headerNames: 
      { 'upgrade-insecure-requests': 'Upgrade-Insecure-Requests',
        'user-agent': 'User-Agent',
        accept: 'Accept',
        'accept-encoding': 'Accept-Encoding',
        'accept-language': 'Accept-Language',
        cookie: 'Cookie',
        host: 'Host' },
     _onPendingData: null,
     agent: 
      Agent {
        domain: null,
        _events: [Object],
        _eventsCount: 1,
        _maxListeners: undefined,
        defaultPort: 80,
        protocol: 'http:',
        options: [Object],
        requests: {},
        sockets: [Object],
        freeSockets: {},
        keepAliveMsecs: 1000,
        keepAlive: false,
        maxSockets: Infinity,
        maxFreeSockets: 256 },
     socketPath: undefined,
     method: 'GET',
     path: 'clientController.do?getlogisticsDetail&parcelNo=900016077939',
     parser: null,
     res: [Circular] },
  read: [Function] }

如您所见，我使用了完全相同的请求方法，主机，路径，标头，但最终状态为200，响应正文为空。

我想念什么？ 我该怎么办？

谢谢！！！

Answer 1

所以您所做的一切都很好，只是您缺少了“ /”

• 路径： /clientController.do?getlogisticsDetail&parcelNo=${pGuid}

这是您具有的代码：'chs'：{主机：'www.zhonghuan.com.au'，路径： clientController.do?getlogisticsDetail&parcelNo=${pGuid} ${ clientController.do?getlogisticsDetail&parcelNo=${pGuid} ，}