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(Unicode C) Iterate MIME Parts of an EmailDemonstrates how to iterate over the MIME sub-parts of an email, and retrieve the content of each MIME sub-part body. Note: This example requires some new features added to Chilkat v9.5.0.95.
#include <C_CkEmailW.h> #include <C_CkStringBuilderW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkEmailW email; BOOL success; HCkStringBuilderW sbContentType; BOOL caseSensitive; BOOL inlineOnly; BOOL excludeAttachments; const wchar_t *searchSpec; int numParts; int i; const wchar_t *textBody; HCkEmailW attachedEmail; HCkBinDataW bdMime; HCkBinDataW bd; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // See the following Chilkat post to Quickly Understand Email MIME email = CkEmailW_Create(); success = CkEmailW_LoadEml(email,L"qa_data/eml/sample.eml"); if (success == FALSE) { wprintf(L"Failed to load .eml\n"); CkEmailW_Dispose(email); return; } sbContentType = CkStringBuilderW_Create(); caseSensitive = FALSE; // Get the total number of non-multipart MIME sub-parts. // (This is a simple way of iterating over all the MIME leaf parts regardless of the MIME tree structure) inlineOnly = FALSE; excludeAttachments = FALSE; searchSpec = L"*/*"; numParts = CkEmailW_GetNumPartsOfType(email,searchSpec,inlineOnly,excludeAttachments); i = 0; while (i < numParts) { // What is the Content-Type of this MIME part? CkStringBuilderW_Append(sbContentType,CkEmailW_getNthContentType(email,i,searchSpec,inlineOnly,excludeAttachments)); if (CkStringBuilderW_StartsWith(sbContentType,L"text/",caseSensitive) == TRUE) { // Get the text body of this MIME part. textBody = CkEmailW_getNthTextPartOfType(email,i,searchSpec,inlineOnly,excludeAttachments); wprintf(L"Got text body for %s\n",CkStringBuilderW_getAsString(sbContentType)); } else { if (CkStringBuilderW_ContentsEqual(sbContentType,L"message/rfc822",caseSensitive) == TRUE) { // If the Content-Type is message/rfc822, then the MIME body for this part contains a full embedded MIME messages. // Your application could load it into a Chilkat email object and recursively process... attachedEmail = CkEmailW_Create(); bdMime = CkBinDataW_Create(); CkEmailW_GetNthBinaryPartOfTypeBd(email,i,searchSpec,inlineOnly,excludeAttachments,bdMime); CkEmailW_SetFromMimeBd(attachedEmail,bdMime); // Now your app can recursively process the attachedEmail... } else { // Get the bytes of this MIME body part. bd = CkBinDataW_Create(); CkEmailW_GetNthBinaryPartOfTypeBd(email,i,searchSpec,inlineOnly,excludeAttachments,bd); wprintf(L"Got binary body for %s numBytes = %d\n",CkStringBuilderW_getAsString(sbContentType),CkBinDataW_getNumBytes(bd)); } } CkStringBuilderW_Clear(sbContentType); i = i + 1; } CkEmailW_Dispose(email); CkStringBuilderW_Dispose(sbContentType); CkEmailW_Dispose(attachedEmail); CkBinDataW_Dispose(bdMime); CkBinDataW_Dispose(bd); } |
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