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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6 #include <ngx_config.h>
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7 #include <ngx_core.h>
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8 #include <ngx_http.h>
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9
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10
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11 static char *ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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12
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13 static ngx_command_t ngx_http_flv_commands[] = {
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14
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15 { ngx_string("flv"),
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16 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
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17 ngx_http_flv,
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18 0,
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19 0,
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20 NULL },
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21
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22 ngx_null_command
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23 };
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24
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25
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26 static u_char ngx_flv_header[] = "FLV\x1\x1\0\0\0\x9\0\0\0\x9";
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27
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28
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29 static ngx_http_module_t ngx_http_flv_module_ctx = {
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30 NULL, /* preconfiguration */
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31 NULL, /* postconfiguration */
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32
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33 NULL, /* create main configuration */
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34 NULL, /* init main configuration */
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35
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36 NULL, /* create server configuration */
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37 NULL, /* merge server configuration */
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38
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39 NULL, /* create location configuration */
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40 NULL /* merge location configuration */
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41 };
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42
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43
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44 ngx_module_t ngx_http_flv_module = {
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45 NGX_MODULE_V1,
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46 &ngx_http_flv_module_ctx, /* module context */
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47 ngx_http_flv_commands, /* module directives */
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48 NGX_HTTP_MODULE, /* module type */
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49 NULL, /* init master */
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50 NULL, /* init module */
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51 NULL, /* init process */
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52 NULL, /* init thread */
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53 NULL, /* exit thread */
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54 NULL, /* exit process */
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55 NULL, /* exit master */
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56 NGX_MODULE_V1_PADDING
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57 };
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58
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59
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60 static ngx_int_t
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61 ngx_http_flv_handler(ngx_http_request_t *r)
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62 {
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63 u_char *p;
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64 off_t start, len;
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65 ngx_fd_t fd;
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66 ngx_int_t rc;
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67 ngx_uint_t level;
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68 ngx_str_t path;
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69 ngx_err_t err;
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70 ngx_log_t *log;
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71 ngx_buf_t *b;
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72 ngx_chain_t out[2];
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73 ngx_file_info_t fi;
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74 ngx_pool_cleanup_t *cln;
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75 ngx_pool_cleanup_file_t *clnf;
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76 ngx_http_core_loc_conf_t *clcf;
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77
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78 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
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79 return NGX_HTTP_NOT_ALLOWED;
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80 }
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81
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82 if (r->uri.data[r->uri.len - 1] == '/') {
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83 return NGX_DECLINED;
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84 }
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85
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86 /* TODO: Win32 */
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87 if (r->zero_in_uri) {
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88 return NGX_DECLINED;
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89 }
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90
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91 rc = ngx_http_discard_body(r);
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92
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93 if (rc != NGX_OK && rc != NGX_AGAIN) {
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94 return rc;
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95 }
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96
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97 if (ngx_http_map_uri_to_path(r, &path, 0) == NULL) {
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98 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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99 }
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100
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101 log = r->connection->log;
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102
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103 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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104 "http flv filename: \"%s\"", path.data);
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105
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106 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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107 if (cln == NULL) {
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108 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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109 }
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110
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111 fd = ngx_open_file(path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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112
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113 if (fd == NGX_INVALID_FILE) {
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114 err = ngx_errno;
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115
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116 if (err == NGX_ENOENT
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117 || err == NGX_ENOTDIR
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118 || err == NGX_ENAMETOOLONG)
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119 {
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120 level = NGX_LOG_ERR;
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121 rc = NGX_HTTP_NOT_FOUND;
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122
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123 } else if (err == NGX_EACCES) {
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124 level = NGX_LOG_ERR;
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125 rc = NGX_HTTP_FORBIDDEN;
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126
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127 } else {
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128 level = NGX_LOG_CRIT;
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129 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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130 }
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131
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132 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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133
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134 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
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135 ngx_log_error(level, log, err,
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136 ngx_open_file_n " \"%s\" failed", path.data);
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137 }
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138
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139 return rc;
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140 }
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141
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142 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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143 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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144 ngx_fd_info_n " \"%s\" failed", path.data);
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145
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146 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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147 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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148 ngx_close_file_n " \"%s\" failed", path.data);
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149 }
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150
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151 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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152 }
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153
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154 if (!ngx_is_file(&fi)) {
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155
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156 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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157 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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158 ngx_close_file_n " \"%s\" failed", path.data);
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159 }
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160
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161 return NGX_DECLINED;
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162 }
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163
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164 start = 0;
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165 len = ngx_file_size(&fi);
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166
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167 if (r->args.len) {
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168 p = (u_char *) ngx_strstr(r->args.data, "start=");
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169
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170 if (p) {
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171 p += 6;
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172
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173 start = ngx_atoof(p, r->args.len - (p - r->args.data));
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174
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175 if (start == NGX_ERROR || start >= len) {
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176 start = 0;
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177 }
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178
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179 len -= start;
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180 }
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181 }
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182
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183 log->action = "sending flv to client";
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184
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185 cln->handler = ngx_pool_cleanup_file;
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186 clnf = cln->data;
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187
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188 clnf->fd = fd;
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189 clnf->name = path.data;
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190 clnf->log = r->pool->log;
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191
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192 r->headers_out.status = NGX_HTTP_OK;
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193 r->headers_out.content_length_n = sizeof(ngx_flv_header) - 1 + len;
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194 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
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195
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196 if (ngx_http_set_content_type(r) != NGX_OK) {
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197 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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198 }
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199
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200 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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201 if (b == NULL) {
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202 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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203 }
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204
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205 b->pos = ngx_flv_header;
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206 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
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207 b->memory = 1;
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208
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209 out[0].buf = b;
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210 out[0].next = &out[1];
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211
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212 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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213 if (b == NULL) {
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214 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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215 }
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216
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217 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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218 if (b->file == NULL) {
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219 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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220 }
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221
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222 rc = ngx_http_send_header(r);
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223
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224 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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225 return rc;
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226 }
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227
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228 b->file_pos = start;
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229 b->file_last = ngx_file_size(&fi);
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230
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231 b->in_file = b->file_last ? 1: 0;
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232 b->last_buf = 1;
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233 b->last_in_chain = 1;
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234
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235 b->file->fd = fd;
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236 b->file->name = path;
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237 b->file->log = log;
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238
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239 out[1].buf = b;
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240 out[1].next = NULL;
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241
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242 return ngx_http_output_filter(r, out);
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243 }
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244
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245
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246 static char *
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247 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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248 {
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249 ngx_http_core_loc_conf_t *clcf;
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250
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251 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
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252 clcf->handler = ngx_http_flv_handler;
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253
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254 return NGX_CONF_OK;
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255 }
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