(Go) HTTP multipart/form-data Upload

Demonstrates how to upload files to an HTTP server using a multipart/form-data POST.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http := chilkat.NewHttp()

    req := chilkat.NewHttpRequest()
    req.SetHttpVerb("POST")
    req.SetContentType("multipart/form-data")
    req.SetPath("rcvFormDataUpload.aspx")

    // Send an "Expect: 100-continue" header in the request.
    // This causes the HTTP server to end a 100-continue response
    // immediately after receiving the HTTP header.  The client
    // (Chilkat) will receive this intermediate response, and if
    // it's not an error response, it knows that the HTTP server will
    // accept the data that is forthcoming.
    // The alternative is to get an error response after trying to upload
    // the entire contents of the files.
    req.AddHeader("Expect","100-continue")

    // Call AddFileForUpload2 for each file to be uploaded in the HTTP multipart/form-data POST
    // To allow Chilkat to determine the content-type automatically based on file-extension,
    // call AddFileForUpload instead.

    // The 1st arg is the filename passed in the HTTP request.
    // The 2nd arg is the path in the local filesytem.
    // The file is not loaded into memory.  It is streamed directly from the file
    // when the HTTP POST is sent.
    success := req.AddFileForUpload2("starfish.jpg","c:/qa_data/starfish.jpg","image/jpg")
    if success != true {
        fmt.Println(req.LastErrorText())
        http.DisposeHttp()
        req.DisposeHttpRequest()
        return
    }

    success = req.AddFileForUpload("something.pdf","c:/qa_data/something.pdf")
    if success != true {
        fmt.Println(req.LastErrorText())
        http.DisposeHttp()
        req.DisposeHttpRequest()
        return
    }

    // Its also possible to add a file from a string:
    success = req.AddStringForUpload("test.xml","test.xml","<abc>This is the test.xml content</abc>","utf-8")
    // We'll assume success since no files are involved..

    // This sends the HTTP request (with 3 files being uploaded) to
    // http://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    // resp is a HttpResponse
    resp := http.SynchronousRequest("www.mywebserver123abc.com",80,false,req)
    if http.LastMethodSuccess() != true {
        fmt.Println(http.LastErrorText())
    }
    else {
        fmt.Println("HTTP response status: ", resp.StatusCode())
        // See the online reference documentation for 
        // other information that can be obtained from the response object.
        resp.DisposeHttpResponse()
    }

    // To send using SSL/TLS, do this instead.
    // This sends to https://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    resp = http.SynchronousRequest("www.mywebserver123abc.com",443,true,req)
    if http.LastMethodSuccess() != true {
        fmt.Println(http.LastErrorText())
    }
    else {
        fmt.Println("HTTP response status: ", resp.StatusCode())
        // See the online reference documentation for 
        // other information that can be obtained from the response object.
        resp.DisposeHttpResponse()
    }


    http.DisposeHttp()
    req.DisposeHttpRequest()