Symbian C ++ multipart/form-data)

The following code can be used to upload any file, image, text, video Etc .. as a binary file to a server.

The httpengine shoshould haveMhttpdatasupplierAs its parent class, as the following functions need to be implemented for the upload Process

 
Tbool getnextdatapart (tptrc8 & adatapart );
Void releasedata ();
Tint reset ();
Tint overalldatasize ();
 

The Content-Type for the post shocould be

 
_ Lit8 (kpostcontenttype, "multipart/form-data; boundary = aab03x ");
 

InMhfrunlThe caseEgotresponsebodydataShocould do this

Mhttpdatasupplier * datasupplier = atransaction. Response (). Body ();
Tptrc8 PTR;
Datasupplier-> getnextdatapart (PTR );
 
 
// Convert to 16-bit Descriptor
Hbufc * Buf = hbufc: newlc (PTR. Length ());
Buf-> des (). Copy (PTR );
 
// Append to ireeclipsebuffer
If (ireeclipsebuffer = NULL)
{
Ireeclipsebuffer = Buf-> allocl ();
}
Else
{
Ireeclipsebuffer = ireeclipsebuffer-> reallocl (ireeclipsebuffer-> length () + Buf-> length ());
Ireeclipsebuffer-> des (). append (* BUF );
}
 
// Release Buf
Cleanupstack: popanddestroy (BUF );
 
If (! Idataavailable)
{
Irunning = efalse;
Itransaction. Close ();
}
Else
{
Datasupplier-> releasedata ();
}
 

Post CodeGet the file you want to upload in binary format

Rfs afs;
User: leaveiferror (AFS. Connect ());
Cleanupclosepushl (AFS );
 
Rfile afile;
 
User: leaveiferror (afile. Open (AFS, ifilename, efile1_any ));
 
Tint asize;
User: leaveiferror (afile. Size (asize ));
 
Ipostdataimage = hbufc8: newl (asize );
Tptr8 aptr = ipostdataimage-> des ();
 
// Obviously we have to read in the data to the ipostdataimage (Ray)
Afile. Read (0, aptr, asize );
 
Afile. Close ();
AFS. Close ();
Cleanupstack: popanddestroy (& AFS );
 

UsingEfile1_anyEnsures that if the file can be opened by any other application. The file is readIpostdataimageAs a binary file.

Now create the upload format

_ Lit8 (kdatastart, "-- aab03x ");
_ Lit8 (kcrlf, "\ r \ n ");
_ Lit8 (kcontent, "content-Disposition: Form-data; name = 'userfile'; filename = '");
_ Lit8 (kfilecompletion ,"'");

_ Contents (kcontent2, "Content-Type: image/GIF ");
_ Contents (kcontent3, "content-transfer-encoding: Binary ");
_ Lit8 (kdataend, "-- aab03x --");

Ipostdata = hbufc8: newl (650 + aptr. Length ());


Tptr8 ipostdataptr = ipostdata-> des ();
Ipostdataptr. Zero ();

Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kdatastart );
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kcontent );
Ipostdataptr. append (afname );
Ipostdataptr. append (kfilecompletion );
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kcontent2 );
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kcontent3 );
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (aptr); // the file in binary
Ipostdataptr. append (kcrlf );
Ipostdataptr. append (kdataend );
Ipostdataptr. append (kcrlf );

Submit the transaction

Rhttpheaders HDR = itransaction. Request (). getheadercollection ();
Addheaderl (HDR, http: euseragent, kuseragent );
Addheaderl (HDR, http: eaccept, kaccept );
Addheaderl (HDR, http: econtenttype, kpostcontenttype );
 
Mhttpdatasupplier * datasupplier = this;
Itransaction. Request (). setbody (* datasupplier );
 
Itransaction. submitl ();
 

Implement datasupplier Functions

 
Tbool chttpexampleengine: getnextdatapart (tptrc8 & adatapart)
{
Tbool retval = efalse;
Adatapart. Set (ipostdata-> des ());
Retval = (adatapart. Length () = 0 );
Idataavailable = retval;
Return retval;
}
 
Tint chttpexampleengine: overalldatasize ()
{
If (ipostdata)
Return ipostdata-> length ();
Else
Return kerrnotfound;
}
 
Void chttpexampleengine: releasedata ()
{
If (idataavailable)
Itransaction. policynewrequestbodypartl ();
}
 

Any binary file can be uploaded with this upload code.