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(Unicode C) Initiate Multipart S3 UploadInitiates an Amazon AWS multipart S3 upload. The following is quoted from the Amazon Simple Storage Service Documentation: "The Multipart upload API enables you to upload large objects in parts. You can use this API to upload new large objects or make a copy of an existing object (see Operations on Objects).
#include <C_CkRestW.h> #include <C_CkAuthAwsW.h> #include <C_CkXmlW.h> void ChilkatSample(void) { HCkRestW rest; BOOL bTls; int port; BOOL bAutoReconnect; BOOL success; HCkAuthAwsW authAws; const wchar_t *fileToUploadPath; const wchar_t *responseXml; HCkXmlW xml; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Other S3 Multipart Upload Examples: // S3 Upload Parts // Complete Multipart Upload // Abort Multipart Upload // List Parts rest = CkRestW_Create(); // Connect to the Amazon AWS REST server. bTls = TRUE; port = 443; bAutoReconnect = TRUE; success = CkRestW_Connect(rest,L"s3.amazonaws.com",port,bTls,bAutoReconnect); // ---------------------------------------------------------------------------- // Important: For buckets created in regions outside us-east-1, // there are three important changes that need to be made. // See Working with S3 Buckets in Non-us-east-1 Regions for the details. // ---------------------------------------------------------------------------- // Provide AWS credentials for the REST call. authAws = CkAuthAwsW_Create(); CkAuthAwsW_putAccessKey(authAws,L"AWS_ACCESS_KEY"); CkAuthAwsW_putSecretKey(authAws,L"AWS_SECRET_KEY"); CkAuthAwsW_putServiceName(authAws,L"s3"); success = CkRestW_SetAuthAws(rest,authAws); // Set the bucket name via the HOST header. // In this case, the bucket name is "chilkat100". CkRestW_putHost(rest,L"chilkat100.s3.amazonaws.com"); // The local file path (on our local system) to upload. fileToUploadPath = L"s3_multipart_uploads/somethingBig.zip"; // The HTTP request to initiate a multipart upload is a POST with no body content.. // This is the tricky part: We would be tempted to pass "/somethingBig.zip?uploads" // in the 2nd argument to FullRequestNoBody. However, we must pass only the path without query // params. The "uploads" query param must be added via AddQueryParam. This allows it to be included // in the AWS signature calculation for authentication. CkRestW_AddQueryParam(rest,L"uploads",L""); responseXml = CkRestW_fullRequestNoBody(rest,L"POST",L"/somethingBig.zip"); if (CkRestW_getLastMethodSuccess(rest) != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); CkAuthAwsW_Dispose(authAws); return; } // When successful, the S3 Storage service will respond with a 200 response code, // with an XML body. if (CkRestW_getResponseStatusCode(rest) != 200) { // Examine the request/response to see what happened. wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest)); wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest)); wprintf(L"response header: %s\n",CkRestW_responseHeader(rest)); wprintf(L"response body: %s\n",responseXml); wprintf(L"---\n"); wprintf(L"LastRequestStartLine: %s\n",CkRestW_lastRequestStartLine(rest)); wprintf(L"LastRequestHeader: %s\n",CkRestW_lastRequestHeader(rest)); } // See http://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadInitiate.html // for a sample of the XML response. wprintf(L"%s\n",responseXml); wprintf(L"----\n"); // Save the XML response to a file, and show the UploadId.. xml = CkXmlW_Create(); CkXmlW_LoadXml(xml,responseXml); CkXmlW_SaveXml(xml,L"s3_multipart_uploads/initiate.xml"); wprintf(L"UploadId = %s\n",CkXmlW_getChildContent(xml,L"UploadId")); wprintf(L"Multipart upload initiated.\n"); CkRestW_Dispose(rest); CkAuthAwsW_Dispose(authAws); CkXmlW_Dispose(xml); } |
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