Poco::Net::HTTPClientSession json 未收到数据内容类型

Question

所以我正在开发服务器端 Nodejs/expressjs 应用程序和客户端 c++/Poco 应用程序。我设法在托管服务器的位置和客户端之间创建了一个会话。但是，每当我尝试发送我的 JSON 有效负载时，express.js 都会显示 req.body 为空。

Google 除了 Content-Type 可能没有正确传输并且看起来是这样之外没有透露太多信息。我确实明确地设置了它，但显然我错过了一步。

客户端

void upload(std::list<std::string>& args) {
    if (args.size() == 0 || args.front() == "--help") {
        help("upload");
        return;
    }

    std::string repo = args.front();
    args.pop_front();

    std::string name, language;
    auto depends = getDepends(name, language);

    // start making the poco json object here
    Poco::JSON::Object obj;
    obj.set("name", name);
    obj.set("url", repo);

    Poco::URI uri("http://url-of-my-server:50001/make_repo");
    std::string path(uri.getPathAndQuery());


    if (path.empty()) path = "/";

    HTTPClientSession session(uri.getHost(), uri.getPort());
    HTTPRequest request(HTTPRequest::HTTP_POST, path, HTTPMessage::HTTP_1_1);
    HTTPResponse response;

    std::ostream& o = session.sendRequest(request);

    std::cout << response.getStatus() << " " << response.getReason() << std::endl;

    session.setKeepAlive(true);
    request.setContentType("application/json");  // definately set Content-Type right?
    obj.stringify(std::cout);                    // can confirm it is spitting out the valid json here
    obj.stringify(o);                            // place the json in the request stream

    std::istream& s = session.receiveResponse(response);

    // do stuff with returned data
}

服务器：

var express = require('express');
var app = express();
var bodyParser = require('body-parser');

var database = require('./database.js');  // one of my files
var connection = database.connection;
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

var port = 50001;   // explicitly set port because environment port kept forcing port 3000

// just a callback to make sure i'm connected to my sql server
connection.query('SELECT 1',function(err, rows) {
    if(err) {
        console.error("Could not connect to the database.");
    } else {
        console.log('connected to database: ' + connection.threadId);
    }

    app.get('/', function(req, res){
        res.send('hello world');
    });

    // this is the route I invoke, (and it is definately invoked)
    app.post('/make_repo', function(req, res, next) {

        console.log(req.headers); // this always returns '{ connection: 'Close', host: 'url-of-my-server:50001' }
        console.log(req.body); // this always returns '{}'

    });

    var listener = app.listen(port, function() {
        console.log("port: " + listener.address().port);
    });

});

看来这是在 Poco 端，因为我可以从 postman 传输测试数据并且它报告正常。我还在 Poco 上将 KeepAlive 设置为 true，这似乎也被忽略了。有没有人用过 Poco 足以提供帮助？

Answer 1

对有状态的流通信方式有点困惑。它是 http，技术上仍然是无状态连接。关于请求的所有信息，除了正文，都必须在您发送初始请求之前完成。

HTTPClientSession session(uri.getHost(), uri.getPort());
HTTPRequest request(HTTPRequest::HTTP_POST, path, HTTPMessage::HTTP_1_1);
HTTPResponse response;

std::stringstream ss;
obj.stringify(ss);
request.setKeepAlive(true);
request.setContentLength(ss.str().size());
request.setContentType("application/json");  // definately set Content-Type right?

std::ostream& o = session.sendRequest(request);
obj.stringify(o);             // can confirm it is spitting out the valid 

std::cout << response.getStatus() << " " << response.getReason() << std::endl;

另外，需要设置我之前尝试过的 contentLength，但由于未正确发送内容类型而无法正常工作。内容长度和类型设置正确后，服务器顺利接收正确

Poco::Net::HTTPClientSession json 未收到数据内容类型

Poco::Net::HTTPClientSession json data Content-Type not received

c++

json

node.js

http

poco-libraries