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weechat-xmpp/request/slack-request-chat-postmess...

268 lines
8.3 KiB
C

#include <libwebsockets.h>
#include <json.h>
#include <stdlib.h>
#include <string.h>
#include "../weechat-plugin.h"
#include "../slack.h"
#include "../slack-workspace.h"
#include "../slack-request.h"
#include "../slack-user.h"
#include "../request/slack-request-chat-postmessage.h"
static const char *const endpoint = "/api/chat.postMessage?"
"token=%s&channel=%s&text=%s&"
"as_user=true&link_names=true&mrkdwn=false&parse=full";
static inline int json_valid(json_object *object, struct t_slack_workspace *workspace)
{
if (!object)
{
weechat_printf(
workspace->buffer,
_("%s%s: error posting message: unexpected response from server"),
weechat_prefix("error"), SLACK_PLUGIN_NAME);
//__asm__("int3");
return 0;
}
return 1;
}
static const struct lws_protocols protocols[];
static int callback_http(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
struct t_slack_request *request = (struct t_slack_request *)user;
struct lws_client_connect_info ccinfo;
int status;
switch (reason)
{
/* because we are protocols[0] ... */
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
weechat_printf(
request->workspace->buffer,
_("%s%s: (%d) error connecting to slack: %s"),
weechat_prefix("error"), SLACK_PLUGIN_NAME, request->idx,
in ? (char *)in : "(null)");
weechat_printf(
request->workspace->buffer,
_("%s%s: (%d) reconnecting..."),
weechat_prefix("error"), SLACK_PLUGIN_NAME, request->idx);
memset(&ccinfo, 0, sizeof(ccinfo)); /* otherwise uninitialized garbage */
ccinfo.context = request->context;
ccinfo.ssl_connection = LCCSCF_USE_SSL;
ccinfo.port = 443;
ccinfo.address = "slack.com";
ccinfo.path = request->uri;
ccinfo.host = ccinfo.address;
ccinfo.origin = ccinfo.address;
ccinfo.method = "GET";
ccinfo.protocol = protocols[0].name;
ccinfo.pwsi = &request->client_wsi;
ccinfo.userdata = request;
lws_client_connect_via_info(&ccinfo);
break;
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
status = lws_http_client_http_response(wsi);
weechat_printf(
request->workspace->buffer,
_("%s%s: (%d) posting message... (%d)"),
weechat_prefix("network"), SLACK_PLUGIN_NAME, request->idx,
status);
break;
/* chunks of chunked content, with header removed */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
{
struct t_json_chunk *new_chunk, *last_chunk;
new_chunk = malloc(sizeof(*new_chunk));
new_chunk->data = malloc((1024 * sizeof(char)) + 1);
new_chunk->data[0] = '\0';
new_chunk->next = NULL;
strncat(new_chunk->data, in, (int)len);
if (request->json_chunks)
{
for (last_chunk = request->json_chunks; last_chunk->next;
last_chunk = last_chunk->next);
last_chunk->next = new_chunk;
}
else
{
request->json_chunks = new_chunk;
}
}
return 0; /* don't passthru */
/* uninterpreted http content */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
{
char buffer[1024 + LWS_PRE];
char *px = buffer + LWS_PRE;
int lenx = sizeof(buffer) - LWS_PRE;
if (lws_http_client_read(wsi, &px, &lenx) < 0)
return -1;
}
return 0; /* don't passthru */
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
{
int chunk_count, i;
char *json_string;
json_object *response, *ok, *error;
struct t_json_chunk *chunk_ptr;
chunk_count = 0;
if (request->json_chunks)
{
chunk_count++;
for (chunk_ptr = request->json_chunks; chunk_ptr->next;
chunk_ptr = chunk_ptr->next)
{
chunk_count++;
}
}
json_string = malloc((1024 * sizeof(char) * chunk_count) + 1);
json_string[0] = '\0';
chunk_ptr = request->json_chunks;
for (i = 0; i < chunk_count; i++)
{
strncat(json_string, chunk_ptr->data, 1024);
chunk_ptr = chunk_ptr->next;
free(request->json_chunks->data);
free(request->json_chunks);
request->json_chunks = chunk_ptr;
}
weechat_printf(
request->workspace->buffer,
_("%s%s: (%d) got response: %s"),
weechat_prefix("network"), SLACK_PLUGIN_NAME, request->idx,
json_string);
response = json_tokener_parse(json_string);
ok = json_object_object_get(response, "ok");
if (!json_valid(ok, request->workspace))
{
json_object_put(response);
free(json_string);
return 0;
}
if(json_object_get_boolean(ok))
{
/* wait for websocket to catch up */
}
else
{
error = json_object_object_get(response, "error");
if (!json_valid(error, request->workspace))
{
json_object_put(response);
free(json_string);
return 0;
}
weechat_printf(
request->workspace->buffer,
_("%s%s: (%d) failed to post message: %s"),
weechat_prefix("error"), SLACK_PLUGIN_NAME, request->idx,
json_object_get_string(error));
}
json_object_put(response);
free(json_string);
}
/* fallthrough */
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
request->client_wsi = NULL;
/* Does not doing this cause a leak?
lws_cancel_service(lws_get_context(wsi));*/ /* abort poll wait */
break;
default:
break;
}
return lws_callback_http_dummy(wsi, reason, user, in, len);
}
static const struct lws_protocols protocols[] = {
{
"http",
callback_http,
0,
0,
},
{ NULL, NULL, 0, 0 }
};
struct t_slack_request *slack_request_chat_postmessage(
struct t_slack_workspace *workspace,
const char *token, const char *channel,
const char *text)
{
struct t_slack_request *request;
struct lws_context_creation_info ctxinfo;
struct lws_client_connect_info ccinfo;
request = slack_request_alloc(workspace);
size_t urilen = snprintf(NULL, 0, endpoint, token, channel, text) + 1;
request->uri = malloc(urilen);
snprintf(request->uri, urilen, endpoint, token, channel, text);
memset(&ctxinfo, 0, sizeof(ctxinfo)); /* otherwise uninitialized garbage */
ctxinfo.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
ctxinfo.port = CONTEXT_PORT_NO_LISTEN; /* we do not run any server */
ctxinfo.protocols = protocols;
request->context = lws_create_context(&ctxinfo);
if (!request->context)
{
weechat_printf(
workspace->buffer,
_("%s%s: (%d) error connecting to slack: lws init failed"),
weechat_prefix("error"), SLACK_PLUGIN_NAME, request->idx);
return NULL;
}
else
{
weechat_printf(
workspace->buffer,
_("%s%s: (%d) contacting slack.com:443"),
weechat_prefix("network"), SLACK_PLUGIN_NAME, request->idx);
}
memset(&ccinfo, 0, sizeof(ccinfo)); /* otherwise uninitialized garbage */
ccinfo.context = request->context;
ccinfo.ssl_connection = LCCSCF_USE_SSL;
ccinfo.port = 443;
ccinfo.address = "slack.com";
ccinfo.path = request->uri;
ccinfo.host = ccinfo.address;
ccinfo.origin = ccinfo.address;
ccinfo.method = "GET";
ccinfo.protocol = protocols[0].name;
ccinfo.pwsi = &request->client_wsi;
ccinfo.userdata = request;
lws_client_connect_via_info(&ccinfo);
return request;
}