const char *
ghttp_get_header(ghttp_request *a_request,
const char *a_hdr)
{
return http_hdr_get_value(a_request->resp->headers,
a_hdr);
}
int
http_req_prepare(http_req *a_req)
{
int l_return = 0;
char l_buf[30];
if (!a_req)
return -1;
memset(l_buf, 0, 30);
/* set the host header */
http_hdr_set_value(a_req->headers,
http_hdr_Host,
a_req->host);
/* check to see if we have an entity body */
if ((a_req->type == http_req_type_post) ||
(a_req->type == http_req_type_put) ||
(a_req->type == http_req_type_trace))
{
sprintf(l_buf, "%d", a_req->body_len);
http_hdr_set_value(a_req->headers,
http_hdr_Content_Length,
l_buf);
}
/* if the user agent isn't set then set a default */
if (http_hdr_get_value(a_req->headers, http_hdr_User_Agent) == NULL)
http_hdr_set_value(a_req->headers, http_hdr_User_Agent,
"libghttp/1.0");
return l_return;
}
int
http_hdr_set_value(http_hdr_list *a_list,
const char *a_name,
const char *a_val)
{
int i = 0;
char *l_temp_value = NULL;
int l_return = 0;
if ((a_list == NULL) || (a_name == NULL) || (a_val == NULL))
goto ec;
l_temp_value = http_hdr_get_value(a_list, a_name);
if (l_temp_value == NULL)
{
for (i = 0; i < HTTP_HDRS_MAX; i++)
{
if (a_list->header[i] == NULL)
{
/* I promise not to mess with this value. */
l_temp_value = (char *)http_hdr_is_known(a_name);
if (l_temp_value)
{
a_list->header[i] = l_temp_value;
/* dont free this later... */
}
else
a_list->header[i] = strdup(a_name);
a_list->value[i] = strdup(a_val);
l_return = 1;
break;
}
}
}
else
{
for (i = 0; i < HTTP_HDRS_MAX; i++)
{
if (a_list->value[i] == l_temp_value)
{
free(a_list->value[i]);
a_list->value[i] = strdup(a_val);
l_return = 1;
break;
}
}
}
ec:
return l_return;
}
int
http_req_send(http_req *a_req, http_trans_conn *a_conn)
{
char *l_request = NULL;
int l_request_len = 0;
int i = 0;
int l_len = 0;
int l_headers_len = 0;
int l_rv = 0;
char *l_content = NULL;
/* see if we need to jump into the function somewhere */
if (a_conn->sync == HTTP_TRANS_ASYNC)
{
if (a_req->state == http_req_state_sending_request)
goto http_req_state_sending_request_jump;
if (a_req->state == http_req_state_sending_headers)
goto http_req_state_sending_headers_jump;
if (a_req->state == http_req_state_sending_body)
goto http_req_state_sending_body_jump;
}
/* enough for the request and the other little headers */
l_request = malloc(30 + strlen(a_req->resource) + (a_conn->proxy_host ?
(strlen(a_req->host) + 20) : 0));
memset(l_request, 0, 30 + strlen(a_req->resource) + (a_conn->proxy_host ?
(strlen(a_req->host) + 20) : 0));
/* copy it into the buffer */
if (a_conn->proxy_host)
{
l_request_len = sprintf(l_request,
"%s %s HTTP/%01.1f\r\n",
http_req_type_char[a_req->type],
a_req->full_uri,
a_req->http_ver);
}
else
{
l_request_len = sprintf(l_request,
"%s %s HTTP/%01.1f\r\n",
http_req_type_char[a_req->type],
a_req->resource,
a_req->http_ver);
}
/* set the request in the connection buffer */
http_trans_append_data_to_buf(a_conn, l_request, l_request_len);
/* free up the request - we don't need it anymore */
free(l_request);
l_request = NULL;
/* set the state */
a_req->state = http_req_state_sending_request;
http_req_state_sending_request_jump:
/* send the request */
do {
l_rv = http_trans_write_buf(a_conn);
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
} while (l_rv == HTTP_TRANS_NOT_DONE);
/* reset the buffer */
http_trans_buf_reset(a_conn);
/* set up all of the headers */
for (i = 0; i < HTTP_HDRS_MAX; i++)
{
l_len = 0;
if (a_req->headers->header[i])
{
l_len = strlen(a_req->headers->header[i]);
if (l_len > 0)
{
http_trans_append_data_to_buf(a_conn, a_req->headers->header[i], l_len);
l_headers_len += l_len;
http_trans_append_data_to_buf(a_conn, ": ", 2);
l_headers_len += 2;
/* note, it's ok to have no value for a request */
if ((l_len = strlen(a_req->headers->value[i])) > 0)
{
http_trans_append_data_to_buf(a_conn, a_req->headers->value[i], l_len);
l_headers_len += l_len;
}
http_trans_append_data_to_buf(a_conn, "\r\n", 2);
l_headers_len += 2;
}
}
}
http_trans_append_data_to_buf(a_conn, "\r\n", 2);
l_headers_len += 2;
/* set the state */
a_req->state = http_req_state_sending_headers;
http_req_state_sending_headers_jump:
/* blast that out to the network */
do {
l_rv = http_trans_write_buf(a_conn);
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
} while (l_rv == HTTP_TRANS_NOT_DONE);
/* reset the buffer */
http_trans_buf_reset(a_conn);
l_content = http_hdr_get_value(a_req->headers, http_hdr_Content_Length);
if (l_content)
{
/* append the information to the buffer */
http_trans_append_data_to_buf(a_conn, a_req->body, a_req->body_len);
a_req->state = http_req_state_sending_body;
http_req_state_sending_body_jump:
do {
l_rv = http_trans_write_buf(a_conn);
if ((a_conn->sync == HTTP_TRANS_ASYNC) && (l_rv == HTTP_TRANS_NOT_DONE))
return HTTP_TRANS_NOT_DONE;
if ((l_rv == HTTP_TRANS_DONE) && (a_conn->last_read == 0))
return HTTP_TRANS_ERR;
} while (l_rv == HTTP_TRANS_NOT_DONE);
/* reset the buffer */
http_trans_buf_reset(a_conn);
}
return HTTP_TRANS_DONE;
}
int http_resp_read_body(http_resp *a_resp, http_req *a_req, http_trans_conn *a_conn)
{
int l_return = 0;
char *l_content_length = NULL;
char *l_transfer_encoding = NULL;
char *l_connection = NULL;
if ((!a_resp) || (!a_conn))
return -1;
a_conn->io_buf_flush_en = 1;
ghttpDebug("a_req->type: %d \n", a_req->type);
/* check to see if we have to jump in anywhere. */
if (a_conn->sync == HTTP_TRANS_ASYNC)
{
ghttpDebug("body_state: %d \n", a_resp->body_state);
if (a_resp->body_state == http_resp_body_read_content_length)
goto http_resp_body_read_content_length_jump;
if (a_resp->body_state == http_resp_body_read_chunked)
goto http_resp_body_read_chunked_jump;
if (a_resp->body_state == http_resp_body_read_standard)
goto http_resp_body_read_standard_jump;
}
/* check to see if there should be an entity body. */
/* check to see if there's a content length */
l_content_length =
http_hdr_get_value(a_resp->headers,
http_hdr_Content_Length);
/* check to see if there's a transfer encoding */
l_transfer_encoding =
http_hdr_get_value(a_resp->headers,
http_hdr_Transfer_Encoding);
/* check to see if the connection header is set */
l_connection =
http_hdr_get_value(a_resp->headers,
http_hdr_Connection);
ghttpDebug("content_length: %s \n", l_content_length ? l_content_length : "null");
ghttpDebug("transfer_encoding: %s \n", l_transfer_encoding ? l_transfer_encoding : "null");
ghttpDebug("connection: %s \n", l_connection ? l_connection : "null");
/* if there's a content length, do your stuff */
if (l_content_length && (a_req->type != http_req_type_head))
{
if (string_is_number(l_content_length) == 0)
{
a_conn->errstr = "Content length in http response was not a number";
return -1;
}
a_resp->content_length = atoi(l_content_length);
/* set the state */
a_resp->body_state = http_resp_body_read_content_length;
http_resp_body_read_content_length_jump:
ghttpDebug("read_body_content_length ... \n");
l_return = read_body_content_length(a_resp, a_req, a_conn);
}
else if (l_content_length)
{
/* this happens in a head request with content length. */
return HTTP_TRANS_DONE;
}
else if (l_transfer_encoding)
{
/* check to see if it's using chunked transfer encoding */
if (!strcasecmp(l_transfer_encoding, "chunked"))
{
/* set the state */
a_resp->body_state = http_resp_body_read_chunked;
http_resp_body_read_chunked_jump:
ghttpDebug("read_body_chunked ... \n");
l_return = read_body_chunked(a_resp, a_req, a_conn);
ghttpDebug("l_return: %d \n", l_return);
}
else
{
/* what kind of encoding? */
a_conn->errstr = "Unknown encoding type in http response";
return -1;
}
}
else
{
a_resp->body_state = http_resp_body_read_standard;
/* set the state */
http_resp_body_read_standard_jump:
ghttpDebug("read_body_standard ... \n");
l_return = read_body_standard(a_resp, a_req, a_conn);
/* after that the connection gets closed */
if (l_return == HTTP_TRANS_DONE)
{
ghttpDebug("close connection \n");
close(a_conn->sock);
a_conn->sock = -1;
}
}
/* check to see if the connection should be closed */
if (l_connection && (l_return != HTTP_TRANS_NOT_DONE))
{
if (!strcasecmp(l_connection, "close"))
{
ghttpDebug("close connection \n");
close (a_conn->sock);
a_conn->sock = -1;
}
}
if (l_return == HTTP_TRANS_DONE)
a_resp->body_state = http_resp_body_start;
return l_return;
}