/**
* HTTP async callback, invoked when new HTTP data is read.
* The EOF condition is indicated by data being NULL.
*/
static void
soap_data_ind(http_async_t *ha, char *data, int len)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
size_t new_length;
soap_rpc_check(sr);
/*
* When data is NULL, we reached EOF and we're done. Time to process
* the data we got back.
*
* The HTTP asynchronous handle is nullified since it is about to be
* closed by the HTTP layer upon return.
*/
if (NULL == data) {
sr->ha = NULL;
soap_process_reply(sr);
return;
}
/*
* Ensure we don't get too much and resize the memory buffer where
* we store the reply if needed.
*/
new_length = size_saturate_add(sr->reply_len, len);
if (new_length > sr->content_len) {
http_async_error(ha, HTTP_ASYNC_DATA2BIG);
return;
}
if (new_length > sr->reply_size) {
size_t new_size = size_saturate_mult(sr->reply_size, 2);
sr->reply_data = hrealloc(sr->reply_data, new_size);
sr->reply_size = new_size;
}
/*
* Append new data.
*/
memcpy(&sr->reply_data[sr->reply_len], data, len);
sr->reply_len = new_length;
}
/**
* Callback invoked when the HTTP data of the request have been sent.
*/
static void
soap_sent_data(const struct http_async *ha,
const struct gnutella_socket *s, const char *data, size_t len,
gboolean deferred)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
soap_rpc_check(sr);
if (GNET_PROPERTY(soap_trace) & SOCK_TRACE_OUT) {
g_debug("----Sent SOAP HTTP data%s to %s (%u bytes):",
deferred ? " completely" : "",
host_addr_port_to_string(s->addr, s->port), (unsigned) len);
dump_string(stderr, data, len, "----");
}
}
/**
* HTTP async callback, invoked on errors.
*/
static void
soap_error_ind(http_async_t *ha, http_errtype_t type, void *val)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
soap_error_t err = SOAP_E_OK;
soap_rpc_check(sr);
if (GNET_PROPERTY(soap_debug)) {
http_async_log_error_dbg(ha, type, val, "SOAP",
GNET_PROPERTY(soap_debug) > 1);
}
if (HTTP_ASYNC_ERROR == type) {
switch (GPOINTER_TO_INT(val)) {
case HTTP_ASYNC_CANCELLED:
/*
* Retry with M-POST if cancelled with sr->retry set to TRUE.
*/
if (sr->retry) {
g_assert(NULL == sr->delay_ev);
sr->delay_ev = cq_main_insert(1, soap_rpc_launch, sr);
if (GNET_PROPERTY(soap_debug) > 1) {
g_message("SOAP \"%s\" at \"%s\": retrying with M-POST",
sr->action, sr->url);
}
}
break; /* No callback on explicit user cancel */
case HTTP_ASYNC_DATA2BIG:
err = SOAP_E_DATA2BIG;
break;
case HTTP_ASYNC_CONN_TIMEOUT:
case HTTP_ASYNC_TIMEOUT:
err = SOAP_E_TIMEOUT;
break;
default:
err = SOAP_E_TRANSPORT;
break;
}
} else {
err = SOAP_E_TRANSPORT;
}
if (err != SOAP_E_OK)
soap_error(sr, err);
}
/**
* Redefine callback invoked when we got the whole HTTP reply.
*/
static void
soap_got_reply(const http_async_t *ha,
const struct gnutella_socket *s, const char *status, const header_t *header)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
soap_rpc_check(sr);
if (GNET_PROPERTY(soap_trace) & SOCK_TRACE_IN) {
g_debug("----Got SOAP HTTP reply from %s:",
host_addr_to_string(s->addr));
if (log_printable(LOG_STDERR)) {
fprintf(stderr, "%s\n", status);
header_dump(stderr, header, "----");
}
}
}
/**
* Analyze the data we have received, and give each line to the supplied
* dispatcher callback `cb', after having chomped it. On EOF, call `eof'
* to finalize parsing.
*/
static void
parse_dispatch_lines(void *handle, const char *buf, size_t len,
parse_dispatch_t cb, parse_eof_t eofile)
{
struct parse_context *ctx;
const char *p = buf;
size_t remain = len;
/*
* Retrieve parsing context, stored as an opaque attribute in the
* asynchronous HTTP request handle.
*/
ctx = http_async_get_opaque(handle);
g_assert(ctx->handle == handle); /* Make sure it's the right context */
if (len == 0) { /* Nothing to parse, got EOF */
if (eofile != NULL)
(*eofile)(ctx);
return;
}
/*
* Read a line at a time.
*/
for (;;) {
char *line;
bool error;
size_t line_len;
size_t parsed;
switch (getline_read(ctx->getline, p, remain, &parsed)) {
case READ_OVERFLOW:
http_async_cancel(handle);
ghc_connecting = FALSE;
return;
case READ_DONE:
p += parsed;
remain -= parsed;
break;
case READ_MORE: /* ok, but needs more data */
g_assert(parsed == remain);
return;
}
/*
* We come here everytime we get a full line.
*/
line = h_strdup(getline_str(ctx->getline));
line_len = getline_length(ctx->getline);
line_len = strchomp(line, line_len);
error = !(*cb)(ctx, line, line_len); /* An ERROR was reported */
HFREE_NULL(line);
if (error) {
ghc_ctx.ha = NULL;
ghc_connecting = FALSE;
return;
}
/*
* Make sure we don't process lines ad infinitum.
*/
ctx->lines++;
if (ctx->lines >= ctx->maxlines) {
const char *req;
const char *url = http_async_info(handle, &req, NULL, NULL, NULL);
if (GNET_PROPERTY(bootstrap_debug))
g_warning("BOOT GHC got %u+ lines from \"%s %s\", stopping",
ctx->lines, req, url);
http_async_close(handle);
ghc_connecting = FALSE;
return;
}
getline_reset(ctx->getline);
}
}
/**
* Build our own HTTP request.
*
* See http_async_build_post_request() for the model and details about
* the various parameters.
*
* @return length of generated request.
*/
static size_t
soap_build_request(const http_async_t *ha,
char *buf, size_t len, const char *verb, const char *path,
const char *content_type, size_t content_len)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
size_t rw;
const char *fixed_header;
soap_rpc_check(sr);
g_assert(len <= INT_MAX);
if (sr->options & SOAP_RPC_O_MAN_FORCE) {
sr->mandatory = TRUE;
} else if ((sr->options & SOAP_RPC_O_MAN_RETRY) && sr->regular) {
sr->mandatory = TRUE;
} else {
sr->mandatory = FALSE;
sr->regular = TRUE;
}
if (sr->options & SOAP_RPC_O_ALL_CAPS) {
fixed_header =
"ACCEPT-ENCODING: deflate\r\n"
"CONNECTION: close\r\n"
"CACHE-CONTROL: no-cache\r\n"
"PRAGMA: no-cache\r\n";
} else {
fixed_header =
"Accept-Encoding: deflate\r\n"
"Connection: close\r\n"
"Cache-Control: no-cache\r\n"
"Pragma: no-cache\r\n";
}
if (sr->mandatory) {
if (sr->options & SOAP_RPC_O_ALL_CAPS) {
rw = gm_snprintf(buf, len,
"M-%s %s HTTP/1.1\r\n"
"HOST: %s\r\n"
"USER-AGENT: %s\r\n"
"CONTENT-TYPE: %s\r\n"
"CONTENT-LENGTH: %s\r\n"
"%s" /* Fixed header part */
"MAN: \"%s\"; ns=01\r\n"
"01-SOAPACTION: \"%s\"\r\n"
"\r\n",
verb, path,
http_async_remote_host_port(ha),
version_string, content_type, size_t_to_string(content_len),
fixed_header, SOAP_NAMESPACE, sr->action);
} else {
rw = gm_snprintf(buf, len,
"M-%s %s HTTP/1.1\r\n"
"Host: %s\r\n"
"User-Agent: %s\r\n"
"Content-Type: %s\r\n"
"Content-Length: %s\r\n"
"%s" /* Fixed header part */
"Man: \"%s\"; ns=01\r\n"
"01-SOAPAction: \"%s\"\r\n"
"\r\n",
verb, path,
http_async_remote_host_port(ha),
version_string, content_type, size_t_to_string(content_len),
fixed_header, SOAP_NAMESPACE, sr->action);
}
} else {
if (sr->options & SOAP_RPC_O_ALL_CAPS) {
rw = gm_snprintf(buf, len,
"%s %s HTTP/1.1\r\n"
"HOST: %s\r\n"
"USER-AGENT: %s\r\n"
"CONTENT-TYPE: %s\r\n"
"CONTENT-LENGTH: %s\r\n"
"%s" /* Fixed header part */
"SOAPACTION: \"%s\"\r\n"
"\r\n",
verb, path,
http_async_remote_host_port(ha),
version_string, content_type, size_t_to_string(content_len),
fixed_header, sr->action);
} else {
rw = gm_snprintf(buf, len,
"%s %s HTTP/1.1\r\n"
"Host: %s\r\n"
"User-Agent: %s\r\n"
"Content-Type: %s\r\n"
"Content-Length: %s\r\n"
"%s" /* Fixed header part */
"SOAPAction: \"%s\"\r\n"
"\r\n",
verb, path,
http_async_remote_host_port(ha),
version_string, content_type, size_t_to_string(content_len),
fixed_header, sr->action);
}
}
return rw;
}
/**
* HTTP async callback, invoked when all the headers have been read.
*
* @return TRUE if we can continue with the request.
*/
static gboolean
soap_header_ind(http_async_t *ha, header_t *header,
int code, const char *message)
{
soap_rpc_t *sr = http_async_get_opaque(ha);
const char *buf;
soap_rpc_check(sr);
g_assert(ha == sr->ha);
if (GNET_PROPERTY(soap_debug) > 2) {
g_debug("SOAP \"%s\" at \"%s\": got HTTP %d %s", sr->action, sr->url,
code, message);
}
/*
* Grab local socket address if they are interested.
*/
if (sr->options & SOAP_RPC_O_LOCAL_ADDR)
sr->got_local_addr = http_async_get_local_addr(ha, &sr->local_addr);
/*
* If we sent a non-mandatory request and get a 405 "Method not allowed"
* error, retry with M-POST. Likewise, a 510 "Not extended" reply is an
* invitation to use the HTTP Extension Framework (RFC 2774).
*/
if (
(405 == code || 510 == code) &&
!sr->mandatory && !sr->retry &&
(sr->options & SOAP_RPC_O_MAN_RETRY)
) {
if (GNET_PROPERTY(soap_debug) > 1) {
g_message("SOAP \"%s\" at \"%s\": will be retrying with M-POST",
sr->action, sr->url);
}
sr->retry = TRUE; /* Signal we should retry */
http_async_cancel(ha);
return FALSE;
}
/*
* If we sent a mandatory request, there needs to be an "Ext:" header
* in the reply to show that the mandatory request was understood as such.
*/
if (sr->mandatory && 200 == code) {
const char *ext = header_get(header, "Ext");
if (NULL == ext) {
if (GNET_PROPERTY(soap_debug)) {
g_warning("SOAP \"%s\" at \"%s\": M-POST not understood",
sr->action, sr->url);
}
http_async_error(ha, HTTP_ASYNC_MAN_FAILURE);
return FALSE;
}
}
/*
* Save the HTTP headers and code to be able to analyze the reply payload.
*
* Since the option HTTP_O_READ_REPLY is used, we'll get the reply data
* from the server even if the status code is not 200 and we need to be
* able to differentiate between a success report and an error.
*/
sr->header = header_refcnt_inc(header);
sr->http_code = code;
/*
* See whether they advertise a Content-Length, which may not be the
* case if chunked transfer encoding is used for the reply. In that
* case, we shall dynamically adjust the reception buffer size.
*/
buf = header_get(header, "Content-Length");
if (buf != NULL) {
guint32 len;
int error;
len = parse_uint32(buf, NULL, 10, &error);
if (error) {
if (GNET_PROPERTY(soap_debug)) {
g_warning("SOAP \"%s\" at \"%s\": "
"cannot parse Content-Length header: "
"value is \"%s\", error is %s",
sr->action, sr->url, buf, g_strerror(error));
}
http_async_error(ha, HTTP_ASYNC_BAD_HEADER);
return FALSE;
}
if (len > sr->maxlen) {
http_async_error(ha, HTTP_ASYNC_DATA2BIG);
return FALSE;
}
sr->content_len = len;
}
/*
* Allocate data buffer: either they advertised content length, or 1/16th
* of the maximum data length we accept to grab from the server.
*/
sr->reply_size = (buf != NULL) ? sr->content_len : (sr->maxlen >> 4);
sr->reply_data = halloc(sr->reply_size);
return TRUE; /* OK, go on */
}