Ns_ConnCopyToFile(3) Copy request content to open file or dstring

Other Alias

Ns_ConnCopyToChannel, Ns_ConnCopyToDString, Ns_ConnCopyToFd


#include "ns.h"

Ns_ConnCopyToChannel(conn, ncopy, chan)

Ns_ConnCopyToDString(conn, ncopy, dsPtr)

Ns_ConnCopyToFd(conn, ncopy, fd)

Ns_ConnCopyToFile(conn, ncopy, fp)


Ns_Channel    chan    (in)
Pointer to Tcl channel open for write.
Ns_Conn    conn    (in)
Pointer to open connection.
Ns_DString    dsPtr    (in)
Initialized dstring.
int    fd    (in)
File descriptor open for write.
FILE    fp    (in)
Stdio FILE pointer open for write.
int    ncopy    (in)
Number of bytes to copy.


These functions copy content from an open connection request to the given open file descriptor, FILE, dstring, or Tcl_Channel. The routines work by copying from the content buffer; see the man page on Ns_ConnContent for how this buffer is managed for both small and large requests.

The functions all return the number of bytes copied which will match the requested ncopy argument unless there is an error writing the content or the requested bytes is greater than the number of bytes still available to be read. An internal offset into the connection is maintained and is shared with routines such as Ns_ConnRead which also consume content from the same buffer. Note that routines which access the entire content, e.g., Ns_ConnContent, Ns_ConnContentFd, or Ns_ConnGetQuery will continue to provide access to the entire request regardless if one of the Ns_ConnCopy or Ns_ConnRead functions have been used.


The following example demonstrates copying user data to a temp file:

   fd = open("myfile.out", O_WRONLY|O_BINARY);
   len = Ns_ConnContentLength(conn);
   if (Ns_ConnCopyToFd(conn, len, fd) != len) {
     ... error writing content or content already consumed ...


connection, content, read