1 | /* |
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2 | * Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com> |
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3 | * All rights reserved |
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4 | * |
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5 | * "THE BEER-WARE LICENSE" (Revision 42): |
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6 | * Sergey Lyubka wrote this file. As long as you retain this notice you |
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7 | * can do whatever you want with this stuff. If we meet some day, and you think |
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8 | * this stuff is worth it, you can buy me a beer in return. |
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9 | */ |
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10 | |
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11 | #include "defs.h" |
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12 | |
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13 | #ifdef HAVE_STRINGS_H |
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14 | #include <strings.h> |
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15 | #endif |
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16 | |
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17 | #if defined(EMBEDDED) |
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18 | const char * |
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19 | shttpd_version(void) |
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20 | { |
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21 | return (VERSION); |
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22 | } |
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23 | |
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24 | static void |
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25 | call_user(struct conn *c, struct shttpd_arg *arg, shttpd_callback_t func) |
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26 | { |
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27 | arg->priv = c; |
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28 | arg->state = c->loc.chan.emb.state; |
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29 | arg->out.buf = io_space(&c->loc.io); |
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30 | arg->out.len = io_space_len(&c->loc.io); |
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31 | arg->out.num_bytes = 0; |
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32 | arg->in.buf = io_data(&c->rem.io);; |
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33 | arg->in.len = io_data_len(&c->rem.io); |
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34 | arg->in.num_bytes = 0; |
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35 | |
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36 | func(arg); |
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37 | |
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38 | io_inc_head(&c->loc.io, arg->out.num_bytes); |
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39 | io_inc_tail(&c->rem.io, arg->in.num_bytes); |
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40 | c->loc.chan.emb.state = arg->state; /* Save state */ |
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41 | |
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42 | /* |
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43 | * If callback finished output, that means it did all cleanup. |
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44 | * If the connection is terminated unexpectedly, we canna call |
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45 | * the callback via the stream close() method from disconnect. |
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46 | * However, if cleanup is already done, we set close() method to |
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47 | * NULL, to prevent the call from disconnect(). |
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48 | */ |
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49 | |
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50 | if (arg->flags & SHTTPD_END_OF_OUTPUT) |
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51 | c->loc.flags &= ~FLAG_DONT_CLOSE; |
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52 | else |
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53 | c->loc.flags |= FLAG_DONT_CLOSE; |
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54 | } |
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55 | |
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56 | static int |
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57 | do_embedded(struct stream *stream, void *buf, size_t len) |
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58 | { |
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59 | struct shttpd_arg arg; |
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60 | buf = NULL; len = 0; /* Squash warnings */ |
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61 | |
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62 | arg.user_data = stream->conn->loc.chan.emb.data; |
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63 | arg.flags = 0; |
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64 | |
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65 | call_user(stream->conn, &arg, (shttpd_callback_t) |
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66 | stream->conn->loc.chan.emb.func.v_func); |
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67 | |
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68 | return (0); |
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69 | } |
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70 | |
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71 | static void |
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72 | close_embedded(struct stream *stream) |
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73 | { |
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74 | struct shttpd_arg arg; |
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75 | struct conn *c = stream->conn; |
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76 | |
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77 | arg.flags = SHTTPD_CONNECTION_ERROR; |
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78 | arg.user_data = c->loc.chan.emb.data; |
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79 | |
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80 | /* |
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81 | * Do not call the user function if SHTTPD_END_OF_OUTPUT was set, |
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82 | * i.e. the callback already terminated correctly |
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83 | */ |
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84 | if (stream->flags & FLAG_DONT_CLOSE) |
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85 | call_user(stream->conn, &arg, (shttpd_callback_t) |
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86 | c->loc.chan.emb.func.v_func); |
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87 | } |
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88 | |
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89 | size_t |
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90 | shttpd_printf(struct shttpd_arg *arg, const char *fmt, ...) |
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91 | { |
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92 | struct conn *c = arg->priv; |
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93 | struct io *io = &c->loc.io; |
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94 | char *buf = io_space(io) + arg->out.num_bytes; |
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95 | int buflen, len = 0; |
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96 | va_list ap; |
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97 | |
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98 | assert(buf <= io->buf + io->size); |
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99 | |
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100 | if ((buflen = (io->buf + io->size) - buf) > 0) { |
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101 | va_start(ap, fmt); |
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102 | len = vsnprintf(buf, buflen, fmt, ap); |
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103 | va_end(ap); |
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104 | |
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105 | if (len < 0 || len > buflen) |
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106 | len = buflen; |
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107 | arg->out.num_bytes += len; |
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108 | } |
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109 | |
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110 | return (len); |
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111 | } |
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112 | |
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113 | const char * |
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114 | shttpd_get_header(struct shttpd_arg *arg, const char *header_name) |
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115 | { |
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116 | struct conn *c = arg->priv; |
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117 | char *p, *s, *e; |
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118 | size_t len; |
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119 | |
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120 | p = c->headers; |
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121 | e = c->request + c->rem.headers_len; |
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122 | len = strlen(header_name); |
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123 | |
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124 | while (p < e) { |
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125 | if ((s = strchr(p, '\n')) != NULL) |
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126 | s[s[-1] == '\r' ? -1 : 0] = '\0'; |
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127 | if (my_strncasecmp(header_name, p, len) == 0) |
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128 | return (p + len + 2); |
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129 | |
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130 | p += strlen(p) + 1; |
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131 | } |
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132 | |
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133 | return (NULL); |
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134 | } |
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135 | |
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136 | const char * |
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137 | shttpd_get_env(struct shttpd_arg *arg, const char *env_name) |
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138 | { |
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139 | struct conn *c = arg->priv; |
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140 | struct vec *vec; |
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141 | |
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142 | if (strcmp(env_name, "REQUEST_METHOD") == 0) { |
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143 | return (known_http_methods[c->method].ptr); |
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144 | } else if (strcmp(env_name, "REQUEST_URI") == 0) { |
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145 | return (c->uri); |
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146 | } else if (strcmp(env_name, "QUERY_STRING") == 0) { |
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147 | return (c->query); |
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148 | } else if (strcmp(env_name, "REMOTE_USER") == 0) { |
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149 | vec = &c->ch.user.v_vec; |
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150 | if (vec->len > 0) { |
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151 | ((char *) vec->ptr)[vec->len] = '\0'; |
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152 | return (vec->ptr); |
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153 | } |
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154 | } else if (strcmp(env_name, "REMOTE_ADDR") == 0) { |
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155 | return (inet_ntoa(c->sa.u.sin.sin_addr));/* FIXME NOT MT safe */ |
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156 | } |
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157 | |
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158 | return (NULL); |
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159 | } |
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160 | |
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161 | void |
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162 | shttpd_get_http_version(struct shttpd_arg *arg, unsigned long *major, unsigned long *minor) |
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163 | { |
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164 | struct conn *c = arg->priv; |
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165 | |
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166 | *major = c->major_version; |
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167 | *minor = c->minor_version; |
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168 | } |
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169 | |
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170 | void |
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171 | shttpd_register_uri(struct shttpd_ctx *ctx, |
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172 | const char *uri, shttpd_callback_t callback, void *data) |
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173 | { |
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174 | struct registered_uri *e; |
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175 | |
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176 | if ((e = malloc(sizeof(*e))) != NULL) { |
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177 | e->uri = my_strdup(uri); |
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178 | e->callback.v_func = (void (*)(void)) callback; |
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179 | e->callback_data = data; |
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180 | LL_TAIL(&ctx->registered_uris, &e->link); |
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181 | } |
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182 | } |
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183 | |
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184 | #if 0 |
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185 | struct shttpd_ctx * |
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186 | shttpd_init2(const char *config_file, char *names[], char *values[], size_t n) |
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187 | { |
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188 | size_t i; |
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189 | |
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190 | for (i = 0; i < n; i++) |
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191 | set_option(names[i], values[i]); |
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192 | |
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193 | return (init_ctx(config_file, 0, NULL)); |
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194 | } |
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195 | #endif |
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196 | |
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197 | void |
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198 | shttpd_protect_uri(struct shttpd_ctx *ctx, const char *uri, const char *file) |
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199 | { |
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200 | struct uri_auth *auth; |
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201 | |
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202 | if ((auth = malloc(sizeof(*auth))) != NULL) { |
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203 | auth->uri = my_strdup(uri); |
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204 | auth->file_name = my_strdup(file); |
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205 | auth->uri_len = strlen(uri); |
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206 | LL_ADD(&ctx->uri_auths, &auth->link); |
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207 | } |
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208 | } |
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209 | |
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210 | int |
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211 | shttpd_get_var(const char *var, const char *buf, int buf_len, |
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212 | char *value, int value_len) |
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213 | { |
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214 | const char *p, *e, *s; |
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215 | size_t var_len; |
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216 | |
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217 | var_len = strlen(var); |
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218 | e = buf + buf_len - var_len; |
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219 | |
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220 | /* buf is "var1=val1&var2=val2...". Find variable first */ |
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221 | for (p = buf; p < e; p++) |
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222 | if (!my_strncasecmp(var, p, var_len) && p[var_len] == '=') { |
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223 | |
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224 | /* Found. Shift to variable value */ |
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225 | e = buf + buf_len; |
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226 | p += var_len + 1; |
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227 | |
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228 | /* Find where the value ends */ |
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229 | if ((s = memchr(p, '&', e - p)) == NULL) |
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230 | s = e; |
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231 | |
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232 | /* Copy value into the buffer, decoding it */ |
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233 | decode_url_encoded_string(p, s - p, value, value_len); |
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234 | |
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235 | return (1); |
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236 | } |
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237 | |
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238 | return (0); |
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239 | } |
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240 | |
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241 | static int |
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242 | match_regexp(const char *regexp, const char *text) |
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243 | { |
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244 | if (*regexp == '\0') |
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245 | return (*text == '\0'); |
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246 | |
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247 | if (*regexp == '*') |
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248 | do { |
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249 | if (match_regexp(regexp + 1, text)) |
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250 | return (1); |
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251 | } while (*text++ != '\0'); |
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252 | |
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253 | if (*text != '\0' && *regexp == *text) |
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254 | return (match_regexp(regexp + 1, text + 1)); |
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255 | |
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256 | return (0); |
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257 | } |
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258 | |
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259 | struct registered_uri * |
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260 | is_registered_uri(struct shttpd_ctx *ctx, const char *uri) |
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261 | { |
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262 | struct llhead *lp; |
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263 | struct registered_uri *reg_uri; |
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264 | |
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265 | LL_FOREACH(&ctx->registered_uris, lp) { |
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266 | reg_uri = LL_ENTRY(lp, struct registered_uri, link); |
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267 | if (match_regexp(reg_uri->uri, uri)) |
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268 | return (reg_uri); |
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269 | } |
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270 | |
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271 | return (NULL); |
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272 | } |
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273 | |
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274 | void |
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275 | setup_embedded_stream(struct conn *c, union variant func, void *data) |
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276 | { |
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277 | c->loc.chan.emb.state = NULL; |
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278 | c->loc.chan.emb.func = func; |
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279 | c->loc.chan.emb.data = data; |
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280 | c->loc.io_class = &io_embedded; |
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281 | c->loc.flags |= FLAG_R | FLAG_W |FLAG_ALWAYS_READY; |
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282 | } |
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283 | |
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284 | void |
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285 | shttpd_handle_error(struct shttpd_ctx *ctx, int code, |
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286 | shttpd_callback_t func, void *data) |
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287 | { |
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288 | struct error_handler *e; |
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289 | |
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290 | if ((e = malloc(sizeof(*e))) != NULL) { |
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291 | e->code = code; |
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292 | e->callback.v_func = (void (*)(void)) func; |
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293 | e->callback_data = data; |
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294 | LL_TAIL(&ctx->error_handlers, &e->link); |
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295 | } |
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296 | } |
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297 | |
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298 | const struct io_class io_embedded = { |
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299 | "embedded", |
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300 | do_embedded, |
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301 | (int (*)(struct stream *, const void *, size_t)) do_embedded, |
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302 | close_embedded |
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303 | }; |
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304 | |
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305 | #endif /* EMBEDDED */ |
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