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(VBScript) Building a multipart/form-data Request for HTTP UploadUploading files to a web server typically requires building a multipart/form-data request where the files are contained in the sub-parts of the MIME request. Note: HTTP uploads require code on the server-side to receive the upload. For example, see Complete C# ASP.NET HTTP Upload Example This example produces the following HTTP multipart/form-data request: POST /something HTTP/1.1 Content-Type: multipart/form-data; boundary=------------070002080409050901090203 Host: domain Content-Length: 546 --------------070002080409050901090203 Content-Disposition: form-data; name="fileA"; filename="fileA.txt" Content-Type: text/plain This is the contents of file A --------------070002080409050901090203 Content-Disposition: form-data; name="fileB"; filename="fileB.txt" Content-Type: text/plain This is the contents of file B --------------070002080409050901090203 Content-Disposition: form-data; name="fileC"; filename="fileC.txt" Content-Type: text/plain This is the contents of file C --------------070002080409050901090203--
Dim fso, outFile Set fso = CreateObject("Scripting.FileSystemObject") 'Create a Unicode (utf-16) output text file. Set outFile = fso.CreateTextFile("output.txt", True, True) ' This example demonstrates building a multipart/form-data request. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.HttpRequest") set req = CreateObject("Chilkat.HttpRequest") ' The ContentType, HttpVerb, and Path properties should ' always be explicitly set. req.HttpVerb = "POST" req.Path = "/something" req.ContentType = "multipart/form-data" ' The contents and name of each file to be uploaded is provided ' by calling any of the following methods: ' AddBytesForUpload ' AddBytesForUpload2 ' AddFileForUpload ' AddFileForUpload2 ' AddStringForUpload ' AddStringForUpload2 ' For this example, we'll provide the contents of the files to be uploaded ' directly as in-memory strings. success = req.AddStringForUpload("fileA","fileA.txt","This is the contents of file A","utf-8") success = req.AddStringForUpload("fileB","fileB.txt","This is the contents of file B","utf-8") success = req.AddStringForUpload("fileC","fileC.txt","This is the contents of file C","utf-8") ' View the request that would be sent if SynchronousRequest was called: requestMime = req.GenerateRequestText() outFile.WriteLine(requestMime) ' A few important comments about the HTTP request that is generated: ' ' 1) Chilkat automatically generates a random boundary string. In 99.999% of cases, this should ' be sufficient. ' 2) The Content-Length header is automatically generated based on the actual length of the MIME message ' that follows the intial (topmost) MIME header. ' 3) The HOST header will automatically get filled in with the actual domain when SynchronousRequest ' is called outFile.Close |
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