带标题的QNetworkRequest

时间:2019-04-25 10:58:47

标签: qt http-headers graphql

我正在使用Qt与GraphQL主机进行交互。我正在使用QNetworkRequest,登录过程做得很好,给了我token的JSON格式。从那时起,GraphQL期望token在HTTP标头中:

{
   "Authorization": "Bearer <token>"
}

测试服务器,我编写了一个小的Python代码,效果很好:

headers = {'Authorization': "Bearer {0}".format(token)}
url = "http://example.com:8000/graphql"
params = {'query': '{fieldQueries{fields(userId:"xxx"){fieldName fieldID}}}'} 
result = requests.post(url, params=params, headers=headers)
print(result.json())

下面的代码应该在Qt中执行相同的操作:

QUrl url = QUrl("http://example.com:8000/graphql");
QNetworkAccessManager * mgr = new QNetworkAccessManager(this);
QNetworkRequest request(url);
QString query = QString("{fieldQueries{fields(userId:\"%1\"){fieldName fieldID}}}").arg(userId);
QUrlQuery params;
params.addQueryItem("query", query);

connect(mgr, SIGNAL(finished(QNetworkReply*)), this, SLOT(onQueryFinish(QNetworkReply*)));
connect(mgr, SIGNAL(finished(QNetworkReply*)), mgr, SLOT(deleteLater()));

auto header = QString("Bearer %1").arg(token);
request.setRawHeader(QByteArray("Authorization"), header.toUtf8());

mgr->post(request, params.query().toUtf8());

但是,服务器会退回internal server error (500)

在我注释掉request.setRawHeader之后,服务器将无错误地发回You are not authorized to run this query.\nNot authenticated

  • 如何使Qt正确发送此标头?

  • 我不知道它是否有帮助,但是我使用 WireShark 检查了数据包。尽管Qt请求被分解为两个数据包,第一个长度为600字节,但该请求由Python生成的数据包是单个数据包(约750个字节)。

工作包:

...POST /graphql?query=%7BfieldQueries%7Bfields%28userId%3A%22xxx%22%29%7BfieldName+fieldID%7D%7D%7D
HTTP/1.1..Host: xxx:8000..
User-Agent: python-requests/2.21.0..
Accept-Encoding: gzip, deflate..
Accept: */*..
Connection: keep-alive..
Content-Type: application/json..
Authorization: Bearer <688 bytes token>..Content-Length: 0....

Qt生成的软件包:

....POST /graphql HTTP/1.1..Host: xxx:8000..
Authorization: Bearer <364 bytes token>..
Content-Type: application/json..
Content-Length: 113..
Connection: Keep-Alive..
Accept-Encoding: gzip, deflate..
Accept-Language: en-US,*..
User-Agent: Mozilla/5.0....

.e..query=%7BfieldQueries%7Bfields(useId:%22xxx%22)%7BfieldName fieldID%7D%7D%7D

1 个答案:

答案 0 :(得分:0)

Graphql accepts都发布GET请求。因此,我使用GET代替发布。它将查询作为URL的一部分而不是标头发送,我从捕获的数据包中发现它们是作为正文发送的。 解决方法如下:

QNetworkAccessManager * mgr = new QNetworkAccessManager(this);
QString query = QString("{fieldQueries{fields(userId:\"%1\"){fieldName fieldID}}}").arg(userId);
QUrl url = QUrl(QString("http://example.com:8000/graphql?query=%1").arg(query));
QNetworkRequest request(url);

connect(mgr, SIGNAL(finished(QNetworkReply*)), this, SLOT(onQueryFinish(QNetworkReply*)));
connect(mgr, SIGNAL(finished(QNetworkReply*)), mgr, SLOT(deleteLater()));

auto header = QString("Bearer %1").arg(token);
request.setRawHeader(QByteArray("Authorization"), header.toUtf8());

mgr->get(request);