** in order to fill this structure appropriately.
*/
int http_exchange(Blob *pSend, Blob *pReply, int useLogin, int maxRedirect){
  Blob login;           /* The login card */
  Blob payload;         /* The complete payload including login card */
  Blob hdr;             /* The HTTP request header */
  int closeConnection;  /* True to close the connection when done */
  int iLength;          /* Expected length of the reply payload */
  int iRecvLen;         /* Received length of the reply payload */
  int rc = 0;           /* Result code */
  int iHttpVersion;     /* Which version of HTTP protocol server uses */
  char *zLine;          /* A single line of the reply header */
  int i;                /* Loop counter */
  int isError = 0;      /* True if the reply is an error message */
  int isCompressed = 1; /* True if the reply is compressed */

  }

  /*
  ** Extract the reply payload that follows the header
  */
  blob_zero(pReply);
  blob_resize(pReply, iLength);
  iRecvLen = transport_receive(&g.url, blob_buffer(pReply), iLength);
  if( iRecvLen != iLength ){
    fossil_warning("response truncated: got %d bytes of %d", iRecvLen, iLength);
    goto write_err;
  }
  blob_resize(pReply, iLength);
  if( isError ){
    char *z;
    int i, j;
    z = blob_str(pReply);
    for(i=j=0; z[i]; i++, j++){
      if( z[i]=='<' ){