diff options
Diffstat (limited to 'src/polypcore/protocol-http.c')
| -rw-r--r-- | src/polypcore/protocol-http.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/src/polypcore/protocol-http.c b/src/polypcore/protocol-http.c new file mode 100644 index 000000000..3e55df03a --- /dev/null +++ b/src/polypcore/protocol-http.c @@ -0,0 +1,265 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + polypaudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with polypaudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <assert.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "protocol-http.h" +#include "ioline.h" +#include "xmalloc.h" +#include "log.h" +#include "namereg.h" +#include "cli-text.h" + +/* Don't allow more than this many concurrent connections */ +#define MAX_CONNECTIONS 10 + +#define internal_server_error(c) http_message((c), 500, "Internal Server Error", NULL) + +#define URL_ROOT "/" +#define URL_CSS "/style" +#define URL_STATUS "/status" + +struct connection { + pa_protocol_http *protocol; + pa_ioline *line; + enum { REQUEST_LINE, MIME_HEADER, DATA } state; + char *url; +}; + +struct pa_protocol_http { + pa_module *module; + pa_core *core; + pa_socket_server*server; + pa_idxset *connections; +}; + +static void http_response(struct connection *c, int code, const char *msg, const char *mime) { + char s[256]; + assert(c); + assert(msg); + assert(mime); + + snprintf(s, sizeof(s), + "HTTP/1.0 %i %s\n" + "Connection: close\n" + "Content-Type: %s\n" + "Cache-Control: no-cache\n" + "Expires: 0\n" + "Server: "PACKAGE_NAME"/"PACKAGE_VERSION"\n" + "\n", code, msg, mime); + + pa_ioline_puts(c->line, s); +} + +static void http_message(struct connection *c, int code, const char *msg, const char *text) { + char s[256]; + assert(c); + + http_response(c, code, msg, "text/html"); + + if (!text) + text = msg; + + snprintf(s, sizeof(s), + "<?xml version=\"1.0\"?>\n" + "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" + "<html xmlns=\"http://www.w3.org/1999/xhtml\"><head><title>%s</title></head>\n" + "<body>%s</body></html>\n", + text, text); + + pa_ioline_puts(c->line, s); + pa_ioline_defer_close(c->line); +} + + +static void connection_free(struct connection *c, int del) { + assert(c); + + if (c->url) + pa_xfree(c->url); + + if (del) + pa_idxset_remove_by_data(c->protocol->connections, c, NULL); + pa_ioline_unref(c->line); + pa_xfree(c); +} + +static void line_callback(pa_ioline *line, const char *s, void *userdata) { + struct connection *c = userdata; + assert(line); + assert(c); + + if (!s) { + /* EOF */ + connection_free(c, 1); + return; + } + + switch (c->state) { + case REQUEST_LINE: { + if (memcmp(s, "GET ", 4)) + goto fail; + + s +=4; + + c->url = pa_xstrndup(s, strcspn(s, " \r\n\t?")); + c->state = MIME_HEADER; + break; + + } + + case MIME_HEADER: { + + /* Ignore MIME headers */ + if (strcspn(s, " \r\n") != 0) + break; + + /* We're done */ + c->state = DATA; + + pa_log_info(__FILE__": request for %s\n", c->url); + + if (!strcmp(c->url, URL_ROOT)) { + char txt[256]; + http_response(c, 200, "OK", "text/html"); + + pa_ioline_puts(c->line, + "<?xml version=\"1.0\"?>\n" + "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" + "<html xmlns=\"http://www.w3.org/1999/xhtml\"><title>"PACKAGE_NAME" "PACKAGE_VERSION"</title>\n" + "<link rel=\"stylesheet\" type=\"text/css\" href=\"style\"/></head><body>\n"); + + pa_ioline_puts(c->line, + "<h1>"PACKAGE_NAME" "PACKAGE_VERSION"</h1>\n" + "<table>"); + +#define PRINTF_FIELD(a,b) pa_ioline_printf(c->line, "<tr><td><b>%s</b></td><td>%s</td></tr>\n",(a),(b)) + + PRINTF_FIELD("User Name:", pa_get_user_name(txt, sizeof(txt))); + PRINTF_FIELD("Fully Qualified Domain Name:", pa_get_fqdn(txt, sizeof(txt))); + PRINTF_FIELD("Default Sample Specification:", pa_sample_spec_snprint(txt, sizeof(txt), &c->protocol->core->default_sample_spec)); + PRINTF_FIELD("Default Sink:", pa_namereg_get_default_sink_name(c->protocol->core)); + PRINTF_FIELD("Default Source:", pa_namereg_get_default_source_name(c->protocol->core)); + + pa_ioline_puts(c->line, "</table>"); + + pa_ioline_puts(c->line, "<p><a href=\"/status\">Click here</a> for an extensive server status report.</p>"); + + pa_ioline_puts(c->line, "</body></html>\n"); + + pa_ioline_defer_close(c->line); + } else if (!strcmp(c->url, URL_CSS)) { + http_response(c, 200, "OK", "text/css"); + + pa_ioline_puts(c->line, + "body { color: black; background-color: white; margin: 0.5cm; }\n" + "a:link, a:visited { color: #900000; }\n" + "p { margin-left: 0.5cm; margin-right: 0.5cm; }\n" + "h1 { color: #00009F; }\n" + "h2 { color: #00009F; }\n" + "ul { margin-left: .5cm; }\n" + "ol { margin-left: .5cm; }\n" + "pre { margin-left: .5cm; background-color: #f0f0f0; padding: 0.4cm;}\n" + ".grey { color: #afafaf; }\n" + "table { margin-left: 1cm; border:1px solid lightgrey; padding: 0.2cm; }\n" + "td { padding-left:10px; padding-right:10px; }\n"); + + pa_ioline_defer_close(c->line); + } else if (!strcmp(c->url, URL_STATUS)) { + char *r; + + http_response(c, 200, "OK", "text/plain"); + r = pa_full_status_string(c->protocol->core); + pa_ioline_puts(c->line, r); + pa_xfree(r); + + pa_ioline_defer_close(c->line); + } else + http_message(c, 404, "Not Found", NULL); + + break; + } + + default: + ; + } + + return; + +fail: + internal_server_error(c); +} + +static void on_connection(pa_socket_server*s, pa_iochannel *io, void *userdata) { + pa_protocol_http *p = userdata; + struct connection *c; + assert(s && io && p); + + if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) { + pa_log_warn(__FILE__": Warning! Too many connections (%u), dropping incoming connection.\n", MAX_CONNECTIONS); + pa_iochannel_free(io); + return; + } + + c = pa_xmalloc(sizeof(struct connection)); + c->protocol = p; + c->line = pa_ioline_new(io); + c->state = REQUEST_LINE; + c->url = NULL; + + pa_ioline_set_callback(c->line, line_callback, c); + pa_idxset_put(p->connections, c, NULL); +} + +pa_protocol_http* pa_protocol_http_new(pa_core *core, pa_socket_server *server, pa_module *m, PA_GCC_UNUSED pa_modargs *ma) { + pa_protocol_http* p; + assert(core && server); + + p = pa_xmalloc(sizeof(pa_protocol_http)); + p->module = m; + p->core = core; + p->server = server; + p->connections = pa_idxset_new(NULL, NULL); + + pa_socket_server_set_callback(p->server, on_connection, p); + + return p; +} + +static void free_connection(void *p, PA_GCC_UNUSED void *userdata) { + assert(p); + connection_free(p, 0); +} + +void pa_protocol_http_free(pa_protocol_http *p) { + assert(p); + + pa_idxset_free(p->connections, free_connection, NULL); + pa_socket_server_unref(p->server); + pa_xfree(p); +} |