TSMBufferCreate(3ts)

NAME
TSMBufferCreate, TSMBufferDestroy, TSHandleMLocRelease - Traffic Server marshall buffers

LIBRARY
Apache Traffic Server plugin API

SYNOPSIS
#include <ts/ts.h>
TSMBuffer
TSMBufferCreate(void);
TSReturnCode
TSMBufferDestroy(TSMBuffer bufp);
TSReturnCode
TSHandleMLocRelease(TSMBuffer bufp, TSMLoc parent, TSMLoc mloc);

DESCRIPTION
The marshal buffer or TSMBuffer is a heap data structure that stores parsed URLs, MIME headers and HTTP headers. You can allocate new objects out of marshal buffers, and change the values within the marshal buffer. Whenever you manipulate an object, you require the handle to the object (TSMLoc) and the marshal buffer containing the object (TSMBuffer).

Any marshal buffer fetched by TSHttpTxn*Get() will be used by other parts of the system. Be careful not to destroy these shared, transaction marshal buffers. TSMBufferCreate() creates a new marshal buffer and initializes the reference count. TSMBufferDestroy() Ignores the reference count and destroys the marshal buffer bufp. The internal data buffer associated with the marshal buffer is also destroyed if the marshal buffer allocated it. TSHandleMLocRelease() Releases the TSMLoc mloc created from the TSMLoc parent. If a TSMLoc is obtained from a transaction, it does not have a parent TSMLoc. Use the the constant TS_NULL_MLOC as its parent.

RETURN VALUES
TSMBufferDestroy() and TSHandleMLocRelease() return TS_SUCCESS on success, or TS_ERROR on failure. TSMBufferCreate() returns the new TSMBuffer.

EXAMPLES
#include <ts/ts.h>
static void
copyResponseMimeHdr (TSCont pCont, TSHttpTxn pTxn)
{
  TSMBuffer respHdrBuf, tmpBuf;
  TSMLoc respHttpHdrLoc, tmpMimeHdrLoc;
  if (!TSHttpTxnClientRespGet(pTxn, &respHdrBuf, &respHttpHdrLoc)) {
    TSError("couldn't retrieve client response header);
    TSHandleMLocRelease(respHdrBuf, TS_NULL_MLOC, respHttpHdrLoc);
    goto done;
  }
  tmpBuf = TSMBufferCreate();
  tmpMimeHdrLoc = TSMimeHdrCreate(tmpBuf);
  TSMimeHdrCopy(tmpBuf, tmpMimeHdrLoc, respHdrBuf, respHttpHdrLoc);
  TSHandleMLocRelease(tmpBuf, TS_NULL_MLOC, tmpMimeHdrLoc);
  TSHandleMLocRelease(respHdrBuf, TS_NULL_MLOC, respHttpHdrLoc);
  TSMBufferDestroy(tmpBuf);
done:
  TSHttpTxnReenable(pTxn, TS_EVENT_HTTP_CONTINUE);
}

SEE ALSO
TSAPI(3ts)