Differential D11070 Diff 29886 plugins/htmlinterface/webserver.cpp

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plugins/htmlinterface/webserver.cpp

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16 * along with this program; if not, write to the * 16​ * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., * 17​ * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * 18​ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/ 19​ ***************************************************************************/
20 20​
21#include <iostream> 21​#include <iostream>
22#include "webserver.h" 22​#include "webserver.h"
23 23​
24using namespace std; ​
25 ​
26#include <stdio.h> 24​#include <stdio.h>
25​#include <sys/stat.h>
26​#include <fcntl.h>
27#include <string.h> 27​#include <string.h>
28#include <QString> 28​#include <QString>
29#include <QRegExp> 29​#include <QRegExp>
30#include <QStringList> 30​#include <QStringList>
31​#include <QMimeDatabase>
32​#include <QUuid>
pinoUnsubmitted
Not Done

Twice?

pino: Twice?
33​#define GET 0
34​#define POST 1
35​#define POSTBUFFERSIZE 65536
31 36​
32using namespace std; 37​using namespace std;
33 38​
34namespace kt { 39​namespace kt {
35 WebServer::WebServer(CoreInterface * core): core(core) 40​ WebServer::WebServer(CoreInterface * core): core(core)
36 { 41​ {
37 42​
38 } 43​ }
39 44​
40 WebServer::~WebServer() 45​ WebServer::~WebServer()
41 { 46​ {
47​ MHD_stop_daemon (daemon);
48​ delete listGenerator;
42 } 49​ }
43 50​
51​ static QMimeDatabase mimeDatabase;
52​
pinoUnsubmitted
Not Done

The hardcoded port is a no-go.

pino: The hardcoded port is a no-go.
53​ static QString BASE_DIRECTORY = QString::fromLatin1("/usr/share/ktorrent/html/");
54​
44 TorrentListGenerator * WebServer::listGenerator; 55​ TorrentListGenerator * WebServer::listGenerator;
45 56​
pinoUnsubmitted
Not Done

Forever loop? How does it exit cleanly, then?

pino: Forever loop? How does it exit cleanly, then?
46 void WebServer::process() 57​ QString WebServer::sessionToken;
58​
59​ const char * WebServer::cookie;
60​
61​ static int respond404(MHD_Connection * connection)
47 { 62​ {
48 listGenerator = new TorrentListGenerator(core); 63​ int ret;
49 struct mg_connection *c; 64​ struct MHD_Response *response;
50 65​
pinoUnsubmitted
Not Done

Hardcoded path.

pino: Hardcoded path.
51 mg_mgr_init(&mgr, NULL); 66​ const char * message = "<html><body>404: The requested resource was not found.</body></html>";
52 c = mg_bind(&mgr, "8880", WebServer::httpeventhandler); 67​
53 mg_set_protocol_http_websocket(c); 68​ response = MHD_create_response_from_buffer (strlen(message), (void *) message, MHD_RESPMEM_PERSISTENT);
54 while (true) { 69​ ret = MHD_queue_response (connection, MHD_HTTP_NOT_FOUND, response);
55 mg_mgr_poll(&mgr, 1000); 70​ MHD_add_response_header (response, MHD_HTTP_HEADER_CONTENT_ENCODING, "text/html");
56 } 71​ MHD_destroy_response (response);
pinoUnsubmitted
Not Done

method is leaked; considering its only use is to compare it to "GET", then just use memcmp with message->method.len instead.

pino: `method` is leaked; considering its only use is to compare it to `"GET"`, then just use…
72​ return ret;
57 } 73​ }
58 74​
59 void WebServer::httpeventhandler(struct mg_connection * c, int ev, void * ev_data) { 75​ static int respond500(MHD_Connection * connection)
pinoUnsubmitted
Not Done

Ditto (same as method for uri).

pino: Ditto (same as `method` for `uri`).
60 if (ev == MG_EV_HTTP_REQUEST) ​
61 { 76​ {
62 struct mg_serve_http_opts opts; 77​ int ret;
78​ struct MHD_Response *response;
63 79​
64 memset(&opts, 0, sizeof(opts)); // Reset all options to defaults 80​ const char * message = "<html><body>500: An internal server error has occured.</body></html>";
pinoUnsubmitted
Not Done

size is not used. Considering my suggestion earlier regarding the return value of TorrentListGenerator::get, then that would solve this issue too.

pino: `size` is not used. Considering my suggestion earlier regarding the return value of…
65 opts.document_root = "/usr/share/ktorrent/html/"; ​
66 81​
67 struct http_message * message = (struct http_message *) ev_data; 82​ response = MHD_create_response_from_buffer (strlen(message), (void *) message, MHD_RESPMEM_PERSISTENT);
83​ ret = MHD_queue_response (connection, MHD_HTTP_INTERNAL_SERVER_ERROR, response);
84​ MHD_add_response_header (response, MHD_HTTP_HEADER_CONTENT_ENCODING, "text/html");
85​ MHD_destroy_response (response);
86​ return ret;
87​ }
68 88​
69 char * method = new char[message->method.len + 1]; 89​ struct Json
70 strncpy(method, message->method.p, message->method.len); 90​ {
pinoUnsubmitted
Not Done

body is leaked, and it is even used only in a specific situation (so no need to create it always).
Also, IMHO it would be much better to wrap the body as QByteArray, using fromRawData to avoid copying it, and pass that to TorrentListGenerator::post.

pino: `body` is leaked, and it is even used only in a specific situation (so no need to create it…
71 method[message->method.len] = '\0'; 91​ QString json;
92​ bool firstPass;
93​ };
72 94​
73 char * uri = new char[message->uri.len + 1]; 95​ int WebServer::answer_to_connection(void * cls, struct MHD_Connection * connection,
74 strncpy(uri, message->uri.p, message->uri.len); 96​ const char * url, const char * method,
pinoUnsubmitted
Not Done

len is not used.

pino: `len` is not used.
75 uri[message->uri.len] = '\0'; 97​ const char * version, const char * upload_data,
98​ size_t * upload_data_size, void ** con_cls)
99​ {
100​ int ret;
101​ struct MHD_Response *response;
76 102​
77 if (strcmp(uri, "/ktorrentdata") == 0 && strcmp(method, "GET") == 0) 103​ if (strcmp("/ktorrentdata", url) == 0 && strcmp("GET", method) == 0)
104​ {
105​ QByteArray json = listGenerator->get();
106​ response = MHD_create_response_from_buffer (json.size(), (void *) json.data(),
107​ MHD_RESPMEM_PERSISTENT);
108​ ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
109​ MHD_destroy_response (response);
110​ return ret;
111​ }
112​ if (strcmp("/ktorrentaction", url) == 0 && strcmp("POST", method) == 0)
113​ {
114​ Json * json;
115​ if (*con_cls == NULL)
78 { 116​ {
79 char * json = NULL; 117​ json = new Json();
80 int size; 118​ *con_cls = (void *) json;
81 listGenerator->get(&json, &size); 119​ json->firstPass = true;
82 mg_send_head(c, 200, size, "Content-Type: application/json\nAccess-Control-Allow-Origin: *"); ​
83 mg_printf(c, "%s", json); ​
84 return; ​
85 } 120​ }
86 if (strcmp(uri, "/ktorrentaction") == 0) 121​ else
87 { 122​ {
88 char * body = new char[message->body.len + 1]; 123​ json = (Json *) *con_cls;
89 strncpy(body, message->body.p, message->body.len); 124​ }
90 body[message->body.len] = '\0'; ​
91 125​
92 if (strcmp(method, "POST") == 0) { 126​ if (json->firstPass) {
93 listGenerator->post(body); 127​ json->firstPass = false;
128​ return MHD_YES;
129​ }
130​ if (*upload_data_size > 0 && !json->firstPass)
131​ {
132​ QString qJson = QString::fromLatin1(upload_data, *upload_data_size);
133​ json->json.append(qJson);
134​ if (checkForToken(connection))
135​ {
136​ listGenerator->post(json->json);
137​ }
138​ *upload_data_size = 0;
139​ return MHD_YES;
94 } 140​ }
95 const char * validation = "{\"status\":\"Request received.\"}"; 141​ const char * validation = "{\"status\":\"Request received.\"}";
96 int len = strlen(validation); 142​ response = MHD_create_response_from_buffer(strlen(validation), (void *) validation,
97 mg_send_head(c, 200, len, "Content-Type: application/json\nAccess-Control-Allow-Origin: *\nAccess-Control-Allow-Headers: X-ACCESS_TOKEN, Access-Control-Allow-Origin, Authorization, Origin, x-requested-with, Content-Type, Content-Range, Content-Disposition, Content-Description\nAccess-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS"); 143​ MHD_RESPMEM_PERSISTENT);
98 mg_printf(c, "%s", validation); 144​ MHD_add_response_header(response, "Content-Type", "application/json");
99 return; 145​ ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
146​ MHD_destroy_response(response);
147​ return ret;
148​ }
149​ struct stat sbuf;
150​ int fd;
151​ if (0 == strcmp(url, "/") || 0 == strcmp(url, "/index"))
152​ {
153​ url = "index.html";
154​ }
155​ QString qUrl = QString::fromLatin1(url);
156​ const char * file = (BASE_DIRECTORY + qUrl).toLatin1().data();
157​ if ((-1 == (fd = open(file, O_RDONLY))) || (0 != fstat(fd, &sbuf)))
158​ {
159​ return respond404(connection);
160​ }
161​ response = MHD_create_response_from_fd_at_offset64(sbuf.st_size, fd, 0);
162​ const char * mimeType = mimeDatabase.mimeTypeForFile(qUrl).name().toLatin1().data();
163​ MHD_add_response_header(response, "Content-Type", mimeType);
164​ MHD_add_response_header(response, "Set-Cookie", makeCookie());
165​ ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
166​ MHD_destroy_response (response);
167​ return ret;
168​ }
169​
170​ static void request_completed (void *cls, struct MHD_Connection *connection,
171​ void **con_cls, enum MHD_RequestTerminationCode toe)
172​ {
173​ Json * json = (Json *) *con_cls;
174​
175​ delete json;
176​ }
177​
178​ void WebServer::process()
179​ {
180​ listGenerator = new TorrentListGenerator(core);
181​ sessionToken = QUuid::createUuid().toString();
182​ cookie = makeCookie();
183​
184​ daemon = MHD_start_daemon(MHD_USE_SELECT_INTERNALLY, 8880, NULL, NULL,
185​ &answer_to_connection, NULL,
186​ MHD_OPTION_NOTIFY_COMPLETED, request_completed,
187​ NULL, MHD_OPTION_END);
188​ }
189​
190​ const char * WebServer::makeCookie()
191​ {
192​ QString tempString = QString::fromLatin1("token=") + sessionToken;
193​ return tempString.toLatin1().data();
100 } 194​ }
101 mg_serve_http(c, (struct http_message *) ev_data, opts); 195​
196​ bool WebServer::checkForToken(MHD_Connection * connection)
197​ {
198​ const char * token = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "session-Token");
199​ if (token == NULL)
200​ {
201​ return false;
202​ }
203​ if (strcmp(token, sessionToken.toLatin1().data()) == 0)
204​ {
205​ return true;
102 } 206​ }
207​ return false;
103 } 208​ }
104} 209​}