C++ Go http:从Qt客户端发送图像后没有这样的文件
我有一个Go API,它可以保存客户端发送的图像。我知道当POST请求来自HTML表单时,Go代码可以工作。 但是,当从QT+C++客户端发送多部分POST请求时,服务器返回错误 http:没有这样的文件 在客户端,我有一个QPixmap,我将其转换为QByteArray,然后发送,但不知怎的,我从Go得到了这个错误。我知道当我删除时,客户端发送的数据长度会减少C++ Go http:从Qt客户端发送图像后没有这样的文件,c++,qt,go,multipartform-data,C++,Qt,Go,Multipartform Data,我有一个Go API,它可以保存客户端发送的图像。我知道当POST请求来自HTML表单时,Go代码可以工作。 但是,当从QT+C++客户端发送多部分POST请求时,服务器返回错误 http:没有这样的文件 在客户端,我有一个QPixmap,我将其转换为QByteArray,然后发送,但不知怎的,我从Go得到了这个错误。我知道当我删除时,客户端发送的数据长度会减少 multi_part->append(image_part); 因此应该发送QPixmap Go代码: func apiUpl
multi_part->append(image_part);
因此应该发送QPixmap
Go代码:
func apiUploadHandler(w http.ResponseWriter, req *http.Request) {
if req.Method == "POST" {
req.ParseMultipartForm(0)
fmt.Printf("%v %v %v", req.RemoteAddr, req.ContentLength, req.Body)
file, fileheader, err := req.FormFile("image")
if err != nil {
cio.PrintMessage(1, err.Error())
return
}
defer file.Close()
var id string
created := false
for created != true {
id = generateImageID()
err = db.CheckIfImageIDInUse(id)
if err != nil {
if err.Error() == "Image ID '"+id+"' exists.'" {
created = false
continue
} else {
created = false
cio.PrintMessage(1, err.Error())
return
}
}
created = true
}
filePath := fsys.ImgStoragePath + id + "." + strings.Split(fileheader.Filename, ".")[1]
err = db.StoreImage(id, strings.Split(fileheader.Filename, ".")[0] /*image name*/, filePath, strings.Split(fileheader.Filename, ".")[1] /*extension*/)
if err != nil {
cio.PrintMessage(1, err.Error())
return
}
bytesCopied, err := fsys.StoreImage(filePath, file)
if err != nil {
cio.PrintMessage(1, err.Error())
return
}
cio.PrintMessage(0, "File "+filePath+" has been created.")
if err != nil {
cio.PrintMessage(1, err.Error())
return
}
cio.PrintMessage(0, "Content of uploaded image ("+strconv.FormatInt(bytesCopied, 10)+" Bytes) has been copied to "+filePath+".")
http.Redirect(w, req, "/"+id, http.StatusFound)
}
}
C++客户端代码:void Share::upload(const QByteArray &data) { QHttpMultiPart *multi_part = new QHttpMultiPart(QHttpMultiPart::FormDataType); QHttpPart text_part; text_part.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"text\"\"")); text_part.setBody("Screenshot.png"); QHttpPart image_part; image_part.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("image/png")); image_part.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"image\"")); image_part.setBody(data); multi_part->append(text_part); multi_part->append(image_part); QNetworkRequest request(QUrl("http://localhost:8000/api/upload")); QNetworkAccessManager *manager = new QNetworkAccessManager(); connect(manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(reply_finished(QNetworkReply *))); manager->post(request, multi_part); qDebug() << QString(data); }
void Share::上传(常量QByteArray和数据){ QHttpMultiPart*multi_part=新的QHttpMultiPart(QHttpMultiPart::FormDataType); QHttpPart文本部分; text_part.setHeader(QNetworkRequest::ContentDispositionHeader,Qvariation(“表单数据;name=\”text\“\”); text_part.setBody(“Screenshot.png”); QHttpPart图像_部分; image_part.setHeader(QNetworkRequest::ContentTypeHeader,QVariant(“image/png”); image\u part.setHeader(QNetworkRequest::ContentDispositionHeader,QVariant(“表单数据;名称=\“图像”)); 图像_零件立根体(数据); 多部分->附加(文本部分); 多零件->附加(图像零件); QNetworkRequest请求(QUrl(“http://localhost:8000/api/upload")); QNetworkAccessManager*manager=新的QNetworkAccessManager(); 连接(管理器,信号(已完成(QNetworkReply*)),此插槽(已完成(QNetworkReply*)); 经理->职位(请求,多个部分);
qDebug()我不确定,但您可以尝试更改差不多image_part.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"image\""));
image_part.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"image\"; filename=\"Screenshot.png\""));
我不知道该说什么。这确实有效。我只是添加了文件名,没有做任何其他事情,现在它有效了。非常感谢!