Go
Go
REST Stream Multipart Body from File
See more REST Examples
Demonstrates how to send a multipart/form-data HTTP request, where one of the parts contains data streamed directly from a file. This is good for cases where the file to be uploaded is very large.Chilkat Go Downloads
success := false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
rest := chilkat.NewRest()
// Connect to the destination web server.
bTls := true
port := 443
bAutoReconnect := true
success = rest.Connect("www.somewebserver.com",port,bTls,bAutoReconnect)
// This example will send the following multipart/form-data request.
// The Content-Length is automatically computed and added by Chilkat.
// POST /some_path HTTP/1.1
// Content-Type: multipart/form-data; boundary=---------------------------735323031399963166993862150
// Content-Length: 834
//
// -----------------------------735323031399963166993862150
// Content-Disposition: form-data; name="text1"
//
// text 123 abc
// -----------------------------735323031399963166993862150
// Content-Disposition: form-data; name="text2"
//
// xyz
// -----------------------------735323031399963166993862150
// Content-Disposition: form-data; name="file1"; filename="a.txt"
// Content-Type: text/plain
//
// Content of a.txt.
//
// -----------------------------735323031399963166993862150
// Content-Disposition: form-data; name="file2"; filename="a.html"
// Content-Type: text/html
//
// <!DOCTYPE html><title>Content of a.html.</title>
//
// -----------------------------735323031399963166993862150
// Content-Disposition: form-data; name="file3"; filename="starfish.jpg"
// Content-Type: image/jpeg
//
// binary data goes here
// -----------------------------735323031399963166993862150--
// Set the Content-Type for the topmost MIME part.
rest.AddHeader("Content-Type","multipart/form-data")
// Specify each part of the request.
rest.SetPartSelector("1")
rest.AddHeader("Content-Disposition","form-data; name=\"text1\"")
rest.SetMultipartBodyString("text 123 abc")
rest.SetPartSelector("2")
rest.AddHeader("Content-Disposition","form-data; name=\"text2\"")
rest.SetMultipartBodyString("xyz")
rest.SetPartSelector("3")
rest.AddHeader("Content-Disposition","form-data; name=\"file1\"; filename=\"a.txt\"")
rest.AddHeader("Content-Type","text/plain")
rest.SetMultipartBodyString("Content of a.txt.")
rest.SetPartSelector("4")
rest.AddHeader("Content-Disposition","form-data; name=\"file2\"; filename=\"a.html\"")
rest.AddHeader("Content-Type","text/html")
sbHtml := chilkat.NewStringBuilder()
sbHtml.LoadFile("qa_data/html/a.html","utf-8")
rest.SetMultipartBodySb(sbHtml)
rest.SetPartSelector("5")
rest.AddHeader("Content-Disposition","form-data; name=\"file3\"; filename=\"starfish.jpg\"")
rest.AddHeader("Content-Type","image/jpeg")
// When the request is sent, stream this part directly from the file.
// This avoids having to load the entire file into memory.
fileStream := chilkat.NewStream()
fileStream.SetSourceFile("qa_data/jpg/starfish.jpg")
rest.SetMultipartBodyStream(fileStream)
responseBody := rest.FullRequestMultipart("POST","/some_path")
if rest.LastMethodSuccess() != true {
fmt.Println(rest.LastErrorText())
rest.DisposeRest()
sbHtml.DisposeStringBuilder()
fileStream.DisposeStream()
return
}
// ...
// ...
// Clear the REST object for any subsequent requests..
rest.ClearAllHeaders()
rest.ClearAllParts()
rest.SetPartSelector("")
rest.DisposeRest()
sbHtml.DisposeStringBuilder()
fileStream.DisposeStream()