C++ Curl_debug函数代码示例

void Curl_infof(struct SessionHandle *data, const char *fmt, ...)
{
  if(data && data->set.verbose) {
    va_list ap;
    size_t len;
    char print_buffer[2048 + 1];
    va_start(ap, fmt);
    vsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
    va_end(ap);
    len = strlen(print_buffer);
    Curl_debug(data, CURLINFO_TEXT, print_buffer, len, NULL);
  }
}

int Curl_sec_read_msg(struct connectdata *conn, char *buffer,
                      enum protection_level level)
{
  /* decoded_len should be size_t or ssize_t but conn->mech->decode returns an
     int */
  int decoded_len;
  char *buf;
  int ret_code;
  size_t decoded_sz = 0;
  CURLcode error;

  DEBUGASSERT(level > PROT_NONE && level < PROT_LAST);

  error = Curl_base64_decode(buffer + 4, (unsigned char **)&buf, &decoded_sz);
  if(error || decoded_sz == 0)
    return -1;

  if(decoded_sz > (size_t)INT_MAX) {
    free(buf);
    return -1;
  }
  decoded_len = curlx_uztosi(decoded_sz);

  decoded_len = conn->mech->decode(conn->app_data, buf, decoded_len,
                                   level, conn);
  if(decoded_len <= 0) {
    free(buf);
    return -1;
  }

  if(conn->data->set.verbose) {
    buf[decoded_len] = '\n';
    Curl_debug(conn->data, CURLINFO_HEADER_IN, buf, decoded_len + 1, conn);
  }

  buf[decoded_len] = '\0';
  DEBUGASSERT(decoded_len > 3);
  if(buf[3] == '-')
    ret_code = 0;
  else {
    /* Check for error? */
    (void)sscanf(buf, "%d", &ret_code);
  }

  if(buf[decoded_len - 1] == '\n')
    buf[decoded_len - 1] = '\0';
  /* FIXME: Is |buffer| length always greater than |decoded_len|? */
  strcpy(buffer, buf);
  free(buf);
  return ret_code;
}

/*
 * Our callback from the SSL/TLS layers.
 */
static void ssl_tls_trace(int direction, int ssl_ver, int content_type,
                          const void *buf, size_t len, const SSL *ssl,
                          struct connectdata *conn)
{
  struct SessionHandle *data = conn->data;
  const char *msg_name, *tls_rt_name;
  char ssl_buf[1024];
  int  ver, msg_type, txt_len;

  if (!conn || !conn->data || !conn->data->set.fdebug ||
      (direction != 0 && direction != 1))
    return;

  data = conn->data;
  ssl_ver >>= 8;
  ver = (ssl_ver == SSL2_VERSION_MAJOR ? '2' :
         ssl_ver == SSL3_VERSION_MAJOR ? '3' : '?');

  /* SSLv2 doesn't seem to have TLS record-type headers, so OpenSSL
   * always pass-up content-type as 0. But the interesting message-type
   * is at 'buf[0]'.
   */
  if (ssl_ver == SSL3_VERSION_MAJOR && content_type != 0)
    tls_rt_name = tls_rt_type(content_type);
  else
    tls_rt_name = "";

  msg_type = *(char*)buf;
  msg_name = ssl_msg_type(ssl_ver, msg_type);

  txt_len = 1 + snprintf(ssl_buf, sizeof(ssl_buf), "SSLv%c, %s%s (%d):\n",
                         ver, tls_rt_name, msg_name, msg_type);
  Curl_debug(data, CURLINFO_TEXT, ssl_buf, txt_len, NULL);

  Curl_debug(data, (direction == 1) ? CURLINFO_SSL_DATA_OUT :
             CURLINFO_SSL_DATA_IN, (char *)buf, len, NULL);
  (void) ssl;
}

/* Curl_sendf() sends formated data to the server */
CURLcode Curl_sendf(curl_socket_t sockfd, struct connectdata *conn,
                    const char *fmt, ...)
{
    struct SessionHandle *data = conn->data;
    ssize_t bytes_written;
    size_t write_len;
    CURLcode res;
    char *s;
    char *sptr;
    va_list ap;
    va_start(ap, fmt);
    s = vaprintf(fmt, ap); /* returns an allocated string */
    va_end(ap);
    if(!s)
        return CURLE_OUT_OF_MEMORY; /* failure */

    bytes_written=0;
    write_len = strlen(s);
    sptr = s;

    while (1)
    {
        /* Write the buffer to the socket */
        res = Curl_write(conn, sockfd, sptr, write_len, &bytes_written);

        if(CURLE_OK != res)
            break;

        if(data->set.verbose)
            Curl_debug(data, CURLINFO_DATA_OUT, sptr, bytes_written);

        if((size_t)bytes_written != write_len)
        {
            /* if not all was written at once, we must advance the pointer, decrease
               the size left and try again! */
            write_len -= bytes_written;
            sptr += bytes_written;
        }
        else
            break;
    }

    free(s); /* free the output string */

    return res;
}

void Curl_failf(struct Curl_easy *data, const char *fmt, ...)
{
  if(data->set.verbose || data->set.errorbuffer) {
    va_list ap;
    size_t len;
    char error[CURL_ERROR_SIZE + 2];
    va_start(ap, fmt);
    vsnprintf(error, CURL_ERROR_SIZE, fmt, ap);
    len = strlen(error);

    if(data->set.errorbuffer && !data->state.errorbuf) {
      strcpy(data->set.errorbuffer, error);
      data->state.errorbuf = TRUE; /* wrote error string */
    }
    if(data->set.verbose) {
      error[len] = '\n';
      error[++len] = '\0';
      Curl_debug(data, CURLINFO_TEXT, error, len, NULL);
    }
    va_end(ap);
  }
}

void Curl_failf(struct SessionHandle *data, const char *fmt, ...)
{
  va_list ap;
  size_t len;
  va_start(ap, fmt);

  vsnprintf(data->state.buffer, BUFSIZE, fmt, ap);

  if(data->set.errorbuffer && !data->state.errorbuf) {
    snprintf(data->set.errorbuffer, CURL_ERROR_SIZE, "%s", data->state.buffer);
    data->state.errorbuf = TRUE; /* wrote error string */
  }
  if(data->set.verbose) {
    len = strlen(data->state.buffer);
    if(len < BUFSIZE - 1) {
      data->state.buffer[len] = '\n';
      data->state.buffer[++len] = '\0';
    }
    Curl_debug(data, CURLINFO_TEXT, data->state.buffer, len, NULL);
  }

  va_end(ap);
}

void Curl_failf(struct SessionHandle *data, const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    if(data->set.errorbuffer && !data->state.errorbuf) {
        vsnprintf(data->set.errorbuffer, CURL_ERROR_SIZE, fmt, ap);
        data->state.errorbuf = TRUE; /* wrote error string */

        if(data->set.verbose) {
            size_t len = strlen(data->set.errorbuffer);
            bool doneit=FALSE;
            if(len < CURL_ERROR_SIZE - 1) {
                doneit = TRUE;
                data->set.errorbuffer[len] = '\n';
                data->set.errorbuffer[++len] = '\0';
            }
            Curl_debug(data, CURLINFO_TEXT, data->set.errorbuffer, len, NULL);
            if(doneit)
                /* cut off the newline again */
                data->set.errorbuffer[--len]=0;
        }
    }
    va_end(ap);
}

void Curl_infof(struct Curl_easy *data, const char *fmt, ...)
{
  if(data && data->set.verbose) {
    va_list ap;
    size_t len;
    char print_buffer[2048 + 1];
    va_start(ap, fmt);
    len = mvsnprintf(print_buffer, sizeof(print_buffer), fmt, ap);
    /*
     * Indicate truncation of the input by replacing the last 3 characters
     * with "...", and transfer the newline over in case the format had one.
     */
    if(len >= sizeof(print_buffer)) {
      len = strlen(fmt);
      if(fmt[--len] == '\n')
        msnprintf(print_buffer + (sizeof(print_buffer) - 5), 5, "...\n");
      else
        msnprintf(print_buffer + (sizeof(print_buffer) - 4), 4, "...");
    }
    va_end(ap);
    len = strlen(print_buffer);
    Curl_debug(data, CURLINFO_TEXT, print_buffer, len);
  }
}

//.........这里部分代码省略.........
                ssize_t tookcareof=0;

                /* now parse the chunked piece of data so that we can
                   properly tell when the stream ends */
                r = Curl_httpchunk_read(conn, ptr, gotbytes, &tookcareof);
                if(r == CHUNKE_STOP) {
                  /* we're done reading chunks! */
                  infof(data, "chunk reading DONE\n");
                  keepon = FALSE;
                  /* we did the full CONNECT treatment, go COMPLETE */
                  conn->tunnel_state[sockindex] = TUNNEL_COMPLETE;
                }
                else
                  infof(data, "Read %zd bytes of chunk, continue\n",
                        tookcareof);
              }
            }
            else
              for(i = 0; i < gotbytes; ptr++, i++) {
                perline++; /* amount of bytes in this line so far */
                if(*ptr == 0x0a) {
                  char letter;
                  int writetype;

                  /* convert from the network encoding */
                  result = Curl_convert_from_network(data, line_start,
                                                     perline);
                  /* Curl_convert_from_network calls failf if unsuccessful */
                  if(result)
                    return result;

                  /* output debug if that is requested */
                  if(data->set.verbose)
                    Curl_debug(data, CURLINFO_HEADER_IN,
                               line_start, (size_t)perline, conn);

                  /* send the header to the callback */
                  writetype = CLIENTWRITE_HEADER;
                  if(data->set.include_header)
                    writetype |= CLIENTWRITE_BODY;

                  result = Curl_client_write(conn, writetype, line_start,
                                             perline);

                  data->info.header_size += (long)perline;
                  data->req.headerbytecount += (long)perline;

                  if(result)
                    return result;

                  /* Newlines are CRLF, so the CR is ignored as the line isn't
                     really terminated until the LF comes. Treat a following CR
                     as end-of-headers as well.*/

                  if(('\r' == line_start[0]) ||
                     ('\n' == line_start[0])) {
                    /* end of response-headers from the proxy */
                    nread = 0; /* make next read start over in the read
                                  buffer */
                    ptr=data->state.buffer;
                    if((407 == k->httpcode) && !data->state.authproblem) {
                      /* If we get a 407 response code with content length
                         when we have no auth problem, we must ignore the
                         whole response-body */
                      keepon = 2;

//.........这里部分代码省略.........
        keepon = FALSE;
      }
    }

    if(!keepon)
      ;
    else if(gotbytes <= 0) {
      keepon = FALSE;
      result = CURLE_RECV_ERROR;
      failf(data, "FTP response reading failed");
    }
    else {
      /* we got a whole chunk of data, which can be anything from one
       * byte to a set of lines and possible just a piece of the last
       * line */
      ssize_t i;
      ssize_t clipamount = 0;
      bool restart = FALSE;

      data->req.headerbytecount += (long)gotbytes;

      pp->nread_resp += gotbytes;
      for(i = 0; i < gotbytes; ptr++, i++) {
        perline++;
        if(*ptr=='\n') {
          /* a newline is CRLF in ftp-talk, so the CR is ignored as
             the line isn't really terminated until the LF comes */

          /* output debug output if that is requested */
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
          if(!conn->sec_complete)
#endif
            if(data->set.verbose)
            Curl_debug(data, CURLINFO_HEADER_IN,
                       pp->linestart_resp, (size_t)perline, conn);

          /*
           * We pass all response-lines to the callback function registered
           * for "headers". The response lines can be seen as a kind of
           * headers.
           */
          result = Curl_client_write(conn, CLIENTWRITE_HEADER,
                                     pp->linestart_resp, perline);
          if(result)
            return result;

          if(pp->endofresp(pp, code)) {
            /* This is the end of the last line, copy the last line to the
               start of the buffer and zero terminate, for old times sake (and
               krb4)! */
            char *meow;
            int n;
            for(meow=pp->linestart_resp, n=0; meow<ptr; meow++, n++)
              buf[n] = *meow;
            *meow=0; /* zero terminate */
            keepon=FALSE;
            pp->linestart_resp = ptr+1; /* advance pointer */
            i++; /* skip this before getting out */

            *size = pp->nread_resp; /* size of the response */
            pp->nread_resp = 0; /* restart */
            break;
          }
          perline=0; /* line starts over here */
          pp->linestart_resp = ptr+1;
        }

/***********************************************************************
 *
 * Curl_pp_sendfv()
 *
 * Send the formated string as a command to a pingpong server. Note that
 * the string should not have any CRLF appended, as this function will
 * append the necessary things itself.
 *
 * NOTE: we build the command in a fixed-length buffer, which sets length
 * restrictions on the command!
 *
 * made to never block
 */
CURLcode Curl_pp_vsendf(struct pingpong *pp,
                        const char *fmt,
                        va_list args)
{
  ssize_t bytes_written;
/* may still not be big enough for some krb5 tokens */
#define SBUF_SIZE 1024
  char s[SBUF_SIZE];
  size_t write_len;
  char *sptr=s;
  CURLcode res = CURLE_OK;
  struct connectdata *conn = pp->conn;
  struct SessionHandle *data = conn->data;

#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
  enum protection_level data_sec = conn->data_prot;
#endif

  vsnprintf(s, SBUF_SIZE-3, fmt, args);

  strcat(s, "\r\n"); /* append a trailing CRLF */

  bytes_written=0;
  write_len = strlen(s);

  Curl_pp_init(pp);

#ifdef CURL_DOES_CONVERSIONS
  res = Curl_convert_to_network(data, s, write_len);
  /* Curl_convert_to_network calls failf if unsuccessful */
  if(res != CURLE_OK) {
    return res;
  }
#endif /* CURL_DOES_CONVERSIONS */

#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
  conn->data_prot = prot_cmd;
#endif
  res = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
                   &bytes_written);
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
  conn->data_prot = data_sec;
#endif

  if(CURLE_OK != res)
    return res;

  if(conn->data->set.verbose)
    Curl_debug(conn->data, CURLINFO_HEADER_OUT,
               sptr, (size_t)bytes_written, conn);

  if(bytes_written != (ssize_t)write_len) {
    /* the whole chunk was not sent, store the rest of the data */
    write_len -= bytes_written;
    sptr += bytes_written;
    pp->sendthis = malloc(write_len);
    if(pp->sendthis) {
      memcpy(pp->sendthis, sptr, write_len);
      pp->sendsize = pp->sendleft = write_len;
    }
    else {
      failf(data, "out of memory");
      res = CURLE_OUT_OF_MEMORY;
    }
  }
  else
    pp->response = Curl_tvnow();

  return res;
}

//.........这里部分代码省略.........
            ssize_t tookcareof = 0;

            /* now parse the chunked piece of data so that we can
               properly tell when the stream ends */
            r = Curl_httpchunk_read(conn, s->ptr, 1, &tookcareof);
            if(r == CHUNKE_STOP) {
              /* we're done reading chunks! */
              infof(data, "chunk reading DONE\n");
              s->keepon = FALSE;
              /* we did the full CONNECT treatment, go COMPLETE */
              s->tunnel_state = TUNNEL_COMPLETE;
            }
          }
          continue;
        }

        s->perline++; /* amount of bytes in this line so far */

        /* if this is not the end of a header line then continue */
        if(*s->ptr != 0x0a) {
          s->ptr++;
          continue;
        }

        /* convert from the network encoding */
        result = Curl_convert_from_network(data, s->line_start,
                                           (size_t)s->perline);
        /* Curl_convert_from_network calls failf if unsuccessful */
        if(result)
          return result;

        /* output debug if that is requested */
        if(data->set.verbose)
          Curl_debug(data, CURLINFO_HEADER_IN,
                     s->line_start, (size_t)s->perline);

        if(!data->set.suppress_connect_headers) {
          /* send the header to the callback */
          int writetype = CLIENTWRITE_HEADER;
          if(data->set.include_header)
            writetype |= CLIENTWRITE_BODY;

          result = Curl_client_write(conn, writetype,
                                     s->line_start, s->perline);
          if(result)
            return result;
        }

        data->info.header_size += (long)s->perline;
        data->req.headerbytecount += (long)s->perline;

        /* Newlines are CRLF, so the CR is ignored as the line isn't
           really terminated until the LF comes. Treat a following CR
           as end-of-headers as well.*/

        if(('\r' == s->line_start[0]) ||
           ('\n' == s->line_start[0])) {
          /* end of response-headers from the proxy */
          s->ptr = s->connect_buffer;
          if((407 == k->httpcode) && !data->state.authproblem) {
            /* If we get a 407 response code with content length
               when we have no auth problem, we must ignore the
               whole response-body */
            s->keepon = 2;

            if(s->cl) {

/***********************************************************************
 *
 * Curl_pp_vsendf()
 *
 * Send the formatted string as a command to a pingpong server. Note that
 * the string should not have any CRLF appended, as this function will
 * append the necessary things itself.
 *
 * made to never block
 */
CURLcode Curl_pp_vsendf(struct pingpong *pp,
                        const char *fmt,
                        va_list args)
{
  ssize_t bytes_written;
  size_t write_len;
  char *fmt_crlf;
  char *s;
  CURLcode result;
  struct connectdata *conn = pp->conn;
  struct Curl_easy *data;

#ifdef HAVE_GSSAPI
  enum protection_level data_sec;
#endif

  DEBUGASSERT(pp->sendleft == 0);
  DEBUGASSERT(pp->sendsize == 0);
  DEBUGASSERT(pp->sendthis == NULL);

  if(!conn)
    /* can't send without a connection! */
    return CURLE_SEND_ERROR;

  data = conn->data;

  fmt_crlf = aprintf("%s\r\n", fmt); /* append a trailing CRLF */
  if(!fmt_crlf)
    return CURLE_OUT_OF_MEMORY;

  s = vaprintf(fmt_crlf, args); /* trailing CRLF appended */
  free(fmt_crlf);
  if(!s)
    return CURLE_OUT_OF_MEMORY;

  bytes_written = 0;
  write_len = strlen(s);

  Curl_pp_init(pp);

  result = Curl_convert_to_network(data, s, write_len);
  /* Curl_convert_to_network calls failf if unsuccessful */
  if(result) {
    free(s);
    return result;
  }

#ifdef HAVE_GSSAPI
  conn->data_prot = PROT_CMD;
#endif
  result = Curl_write(conn, conn->sock[FIRSTSOCKET], s, write_len,
                     &bytes_written);
#ifdef HAVE_GSSAPI
  data_sec = conn->data_prot;
  DEBUGASSERT(data_sec > PROT_NONE && data_sec < PROT_LAST);
  conn->data_prot = data_sec;
#endif

  if(result) {
    free(s);
    return result;
  }

  if(conn->data->set.verbose)
    Curl_debug(conn->data, CURLINFO_HEADER_OUT,
               s, (size_t)bytes_written, conn);

  if(bytes_written != (ssize_t)write_len) {
    /* the whole chunk was not sent, keep it around and adjust sizes */
    pp->sendthis = s;
    pp->sendsize = write_len;
    pp->sendleft = write_len - bytes_written;
  }
  else {
    free(s);
    pp->sendthis = NULL;
    pp->sendleft = pp->sendsize = 0;
    pp->response = Curl_now();
  }

  return CURLE_OK;
}