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244
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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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248
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65 size_t root;
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244
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66 ngx_fd_t fd;
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67 ngx_int_t rc;
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246
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68 ngx_uint_t level, i;
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244
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69 ngx_str_t path;
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70 ngx_err_t err;
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71 ngx_log_t *log;
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72 ngx_buf_t *b;
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73 ngx_chain_t out[2];
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74 ngx_file_info_t fi;
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75 ngx_pool_cleanup_t *cln;
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76 ngx_pool_cleanup_file_t *clnf;
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77 ngx_http_core_loc_conf_t *clcf;
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78
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79 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
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80 return NGX_HTTP_NOT_ALLOWED;
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81 }
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82
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83 if (r->uri.data[r->uri.len - 1] == '/') {
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84 return NGX_DECLINED;
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85 }
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86
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87 /* TODO: Win32 */
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88 if (r->zero_in_uri) {
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89 return NGX_DECLINED;
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90 }
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91
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326
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92 rc = ngx_http_discard_request_body(r);
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244
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93
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326
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94 if (rc != NGX_OK) {
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244
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95 return rc;
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96 }
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97
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248
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98 if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
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244
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99 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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100 }
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101
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102 log = r->connection->log;
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103
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104 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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105 "http flv filename: \"%s\"", path.data);
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106
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107 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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108 if (cln == NULL) {
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109 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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110 }
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111
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276
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112 fd = ngx_open_file(path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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244
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113
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114 if (fd == NGX_INVALID_FILE) {
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115 err = ngx_errno;
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116
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117 if (err == NGX_ENOENT
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118 || err == NGX_ENOTDIR
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119 || err == NGX_ENAMETOOLONG)
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120 {
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121 level = NGX_LOG_ERR;
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122 rc = NGX_HTTP_NOT_FOUND;
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123
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124 } else if (err == NGX_EACCES) {
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125 level = NGX_LOG_ERR;
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126 rc = NGX_HTTP_FORBIDDEN;
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127
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128 } else {
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129 level = NGX_LOG_CRIT;
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130 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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131 }
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132
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133 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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134
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135 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
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136 ngx_log_error(level, log, err,
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137 ngx_open_file_n " \"%s\" failed", path.data);
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138 }
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139
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140 return rc;
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141 }
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142
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143 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
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144 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
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145 ngx_fd_info_n " \"%s\" failed", path.data);
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146
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147 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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148 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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149 ngx_close_file_n " \"%s\" failed", path.data);
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150 }
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151
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152 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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153 }
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154
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155 if (!ngx_is_file(&fi)) {
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156
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157 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
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158 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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159 ngx_close_file_n " \"%s\" failed", path.data);
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160 }
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161
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162 return NGX_DECLINED;
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163 }
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164
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165 start = 0;
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166 len = ngx_file_size(&fi);
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246
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167 i = 1;
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244
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168
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169 if (r->args.len) {
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170 p = (u_char *) ngx_strstr(r->args.data, "start=");
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171
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172 if (p) {
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173 p += 6;
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174
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175 start = ngx_atoof(p, r->args.len - (p - r->args.data));
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176
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177 if (start == NGX_ERROR || start >= len) {
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178 start = 0;
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179 }
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180
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246
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181 if (start) {
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182 len = sizeof(ngx_flv_header) - 1 + len - start;
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183 i = 0;
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184 }
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244
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185 }
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186 }
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187
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188 log->action = "sending flv to client";
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189
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190 cln->handler = ngx_pool_cleanup_file;
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191 clnf = cln->data;
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192
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193 clnf->fd = fd;
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194 clnf->name = path.data;
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195 clnf->log = r->pool->log;
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196
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197 r->headers_out.status = NGX_HTTP_OK;
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246
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198 r->headers_out.content_length_n = len;
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244
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199 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
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200
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201 if (ngx_http_set_content_type(r) != NGX_OK) {
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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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246
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205 if (i == 0) {
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206 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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207 if (b == NULL) {
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208 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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209 }
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210
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211 b->pos = ngx_flv_header;
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212 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
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213 b->memory = 1;
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244
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214
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215 out[0].buf = b;
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216 out[0].next = &out[1];
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250
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217
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218 } else {
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219 r->allow_ranges = 1;
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246
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220 }
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244
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221
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250
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222
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244
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223 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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224 if (b == NULL) {
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225 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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226 }
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227
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228 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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229 if (b->file == NULL) {
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230 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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231 }
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232
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233 rc = ngx_http_send_header(r);
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234
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235 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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236 return rc;
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237 }
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238
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239 b->file_pos = start;
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240 b->file_last = ngx_file_size(&fi);
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241
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242 b->in_file = b->file_last ? 1: 0;
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243 b->last_buf = 1;
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244 b->last_in_chain = 1;
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245
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246 b->file->fd = fd;
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247 b->file->name = path;
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248 b->file->log = log;
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249
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250 out[1].buf = b;
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251 out[1].next = NULL;
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252
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246
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253 return ngx_http_output_filter(r, &out[i]);
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244
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254 }
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255
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256
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257 static char *
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258 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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259 {
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260 ngx_http_core_loc_conf_t *clcf;
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261
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262 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
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263 clcf->handler = ngx_http_flv_handler;
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264
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265 return NGX_CONF_OK;
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266 }
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