src/server/daemon/sessionhandler.c

Sat, 06 Oct 2012 13:00:07 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 06 Oct 2012 13:00:07 +0200
changeset 36
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server can reload configuration

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2011 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "../public/nsapi.h"
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33
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34 #include "sessionhandler.h"
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35 #include "httprequest.h"
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36 #include "httpparser.h"
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37
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38 typedef struct _event_http_io {
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39 HTTPRequest *request;
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40 HttpParser *parser;
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41 } EventHttpIO;
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42
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43 SessionHandler* create_basic_session_handler() {
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44 BasicSessionHandler *handler = malloc(sizeof(BasicSessionHandler));
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45 handler->threadpool = threadpool_new(8);
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46 handler->sh.enqueue_connection = basic_enq_conn;
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47
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48
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49 return (SessionHandler*)handler;
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50 }
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51
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52 void basic_enq_conn(SessionHandler *handler, Connection *conn) {
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53 BasicSessionHandler *sh = (BasicSessionHandler*)handler;
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54 conn->session_handler = handler;
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55 threadpool_run(sh->threadpool, basic_run_session, conn);
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56 }
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57
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58 void* basic_run_session(void *data) {
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59 Connection *conn = (Connection*)data;
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60
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61 HTTPRequest *request = http_request_new();
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62 request->connection = conn;
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63
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64 // read request
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65 netbuf *buf = malloc(sizeof(netbuf));
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66 buf->rdtimeout = 120;
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67 buf->pos = 0;
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68 buf->cursize = 0;
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69 buf->maxsize = 2048;
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70 buf->sd = &conn->fd;
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71 buf->inbuf = malloc(2048);
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72 buf->errmsg = NULL;
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73
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74 request->netbuf = buf;
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75
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76 HttpParser *parser = http_parser_new(request);
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77 int state;
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78 int r;
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79 r = read(conn->fd, buf->inbuf + buf->pos, buf->maxsize - buf->pos);
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80 if(r == -1) {
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81 // TODO: error handling
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82 fprintf(stderr, "%s\n", "Error: Cannot read from socket");
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83 return NULL;
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84 }
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85 buf->cursize += r;
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86 while((state = http_parser_process(parser)) != 0) {
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87 if(state == 2) {
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88 // TODO: error handling
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89 fprintf(stderr, "%s\n", "Error: Cannot parse http request");
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90 return NULL;
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91 }
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92 r = read(conn->fd, buf->inbuf + buf->pos, buf->maxsize - buf->pos);
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93 if(r == -1) {
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94 // TODO: error handling
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95 fprintf(stderr, "%s\n", "Error: Cannot read from socket");
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96 return NULL;
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97 }
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98 buf->cursize += r;
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99 }
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100
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101 // process request
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102 r = handle_request(request);
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103
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104
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105 return NULL;
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106 }
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107
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108 /* ----- event session handler ----- */
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109
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110 SessionHandler* create_event_session_handler() {
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111 EventSessionHandler *handler = malloc(sizeof(EventSessionHandler));
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112 handler->eventhandler = get_default_event_handler();
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113 handler->sh.enqueue_connection = evt_enq_conn;
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114 return (SessionHandler*)handler;
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115 }
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116
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117 void evt_enq_conn(SessionHandler *handler, Connection *conn) {
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118 HTTPRequest *request = http_request_new();
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119 request->connection = conn;
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120
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121 // set socket non blocking
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122 int flags;
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123 if (-1 == (flags = fcntl(conn->fd, F_GETFL, 0))) {
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124 flags = 0;
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125 }
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126 if (fcntl(conn->fd, F_SETFL, flags | O_NONBLOCK) != 0) {
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127 perror("Error: start_event_session: fcntl");
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128 // TODO: error
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129 }
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130
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131 // TODO: remove code redundancy (basic_run_session)
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132
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133 // read request
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134 netbuf *buf = malloc(sizeof(netbuf));
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135 buf->rdtimeout = 120;
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136 buf->pos = 0;
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137 buf->cursize = 0;
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138 buf->maxsize = 2048;
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139 buf->sd = &conn->fd;
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140 buf->inbuf = malloc(2048);
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141 buf->errmsg = NULL;
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142
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143 request->netbuf = buf;
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144
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145 HttpParser *parser = http_parser_new(request);
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146
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147 EventHttpIO *io = malloc(sizeof(EventHttpIO));
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148 if(io == NULL) {
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149 // TODO: error handling
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150 }
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151 io->request = request;
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152 io->parser = parser;
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153
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154 /*
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155 * to start the request handling, we begin with a poll on the socket,
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156 *
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157 * evt_enq_conn() --> event handler --> handle_request()
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158 */
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159
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160 event_handler_t *ev = ((EventSessionHandler*)handler)->eventhandler;
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161
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162 event_t *event = malloc(sizeof(event_t));
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163 event->fn = evt_request_input;
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164 event->cookie = io;
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165
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166 if(ev_pollin(ev, conn->fd, event) != 0) {
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167 perror("poll");
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168 }
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169 }
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170
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171 void evt_request_input(event_handler_t *handler, event_t *event) {
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172 EventHttpIO *io = event->cookie;
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173 HttpParser *parser = io->parser;
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174 HTTPRequest *request = io->request;
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175 netbuf *buf = request->netbuf;
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176
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177 int state;
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178 int r;
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179 r = read(
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180 request->connection->fd,
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181 buf->inbuf + buf->pos,
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182 buf->maxsize - buf->pos);
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183 if(r == -1) {
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184 // TODO: error handling
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185 fprintf(stderr, "%s\n", "Error: Cannot read from socket");
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186 return;
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187 }
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188
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189 buf->cursize += r;
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190 state = http_parser_process(parser);
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191 if(state == 2) {
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192 // TODO: error handling
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193 fprintf(stderr, "%s\n", "Error: Cannot parse http request");
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194 return;
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195 } else if(state == 1) {
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196 // we need more data -> begin poll, which repeats this function
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197 ev_pollin(handler, request->connection->fd, event);
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198 // TODO: check ev_pollin return value for errors
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199 return;
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200 }
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201
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202 // we are done with reading
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203
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204 // set socket blocking
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205 int flags;
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206 if (-1 == (flags = fcntl(request->connection->fd, F_GETFL, 0))) {
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207 flags = 0;
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208 }
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209 if (fcntl(request->connection->fd, F_SETFL, flags & ~O_NONBLOCK) != 0) {
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210 perror("Error: evt_request_input: fcntl");
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211 // TODO: critical error
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212 }
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213
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214 // process request
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215 r = handle_request(request);
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216 }

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