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(Visual FoxPro) REST Stream Multipart Body from FileDemonstrates 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.
LOCAL loRest LOCAL lnBTls LOCAL lnPort LOCAL lnBAutoReconnect LOCAL lnSuccess LOCAL loSbHtml LOCAL loFileStream LOCAL lcResponseBody * This example requires the Chilkat API to have been previously unlocked. * See Global Unlock Sample for sample code. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rest') loRest = CreateObject('Chilkat.Rest') * Connect to the destination web server. lnBTls = 1 lnPort = 443 lnBAutoReconnect = 1 lnSuccess = loRest.Connect("www.somewebserver.com",lnPort,lnBTls,lnBAutoReconnect) * 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. loRest.AddHeader("Content-Type","multipart/form-data") * Specify each part of the request. loRest.PartSelector = "1" loRest.AddHeader("Content-Disposition",'form-data; name="text1"') loRest.SetMultipartBodyString("text 123 abc") loRest.PartSelector = "2" loRest.AddHeader("Content-Disposition",'form-data; name="text2"') loRest.SetMultipartBodyString("xyz") loRest.PartSelector = "3" loRest.AddHeader("Content-Disposition",'form-data; name="file1"; filename="a.txt"') loRest.AddHeader("Content-Type","text/plain") loRest.SetMultipartBodyString("Content of a.txt.") loRest.PartSelector = "4" loRest.AddHeader("Content-Disposition",'form-data; name="file2"; filename="a.html"') loRest.AddHeader("Content-Type","text/html") * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder') loSbHtml = CreateObject('Chilkat.StringBuilder') loSbHtml.LoadFile("qa_data/html/a.html","utf-8") loRest.SetMultipartBodySb(loSbHtml) loRest.PartSelector = "5" loRest.AddHeader("Content-Disposition",'form-data; name="file3"; filename="starfish.jpg"') loRest.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. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Stream') loFileStream = CreateObject('Chilkat.Stream') loFileStream.SourceFile = "qa_data/jpg/starfish.jpg" loRest.SetMultipartBodyStream(loFileStream) lcResponseBody = loRest.FullRequestMultipart("POST","/some_path") IF (loRest.LastMethodSuccess <> 1) THEN ? loRest.LastErrorText RELEASE loRest RELEASE loSbHtml RELEASE loFileStream CANCEL ENDIF * ... * ... * Clear the REST object for any subsequent requests.. loRest.ClearAllHeaders() loRest.ClearAllParts() loRest.PartSelector = "" RELEASE loRest RELEASE loSbHtml RELEASE loFileStream |
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