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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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388
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63 u_char *p, *n, *last;
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244
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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_int_t rc;
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246
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67 ngx_uint_t level, i;
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244
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68 ngx_str_t path;
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69 ngx_log_t *log;
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70 ngx_buf_t *b;
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71 ngx_chain_t out[2];
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332
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72 ngx_open_file_info_t of;
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244
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73 ngx_http_core_loc_conf_t *clcf;
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74
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75 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
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76 return NGX_HTTP_NOT_ALLOWED;
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77 }
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78
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79 if (r->uri.data[r->uri.len - 1] == '/') {
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80 return NGX_DECLINED;
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81 }
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82
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83 /* TODO: Win32 */
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84 if (r->zero_in_uri) {
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85 return NGX_DECLINED;
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86 }
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87
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326
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88 rc = ngx_http_discard_request_body(r);
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244
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89
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326
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90 if (rc != NGX_OK) {
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244
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91 return rc;
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92 }
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93
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332
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94 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
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95 if (last == NULL) {
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244
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96 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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97 }
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98
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99 log = r->connection->log;
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100
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332
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101 path.len = last - path.data;
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244
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102
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332
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103 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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104 "http flv filename: \"%V\"", &path);
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105
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106 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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244
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107
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384
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108 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
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109
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358
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110 of.valid = clcf->open_file_cache_valid;
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111 of.min_uses = clcf->open_file_cache_min_uses;
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332
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112 of.errors = clcf->open_file_cache_errors;
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113 of.events = clcf->open_file_cache_events;
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340
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114
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362
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115 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
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116 != NGX_OK)
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117 {
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332
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118 switch (of.err) {
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119
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120 case 0:
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121 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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122
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123 case NGX_ENOENT:
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124 case NGX_ENOTDIR:
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125 case NGX_ENAMETOOLONG:
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126
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127 level = NGX_LOG_ERR;
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128 rc = NGX_HTTP_NOT_FOUND;
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332
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129 break;
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244
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130
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332
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131 case NGX_EACCES:
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132
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133 level = NGX_LOG_ERR;
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134 rc = NGX_HTTP_FORBIDDEN;
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135 break;
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244
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136
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332
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137 default:
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138
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139 level = NGX_LOG_CRIT;
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140 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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332
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141 break;
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244
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142 }
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143
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144 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
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332
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145 ngx_log_error(level, log, of.err,
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244
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146 ngx_open_file_n " \"%s\" failed", path.data);
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147 }
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148
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149 return rc;
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150 }
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151
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332
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152 if (!of.is_file) {
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244
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153
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356
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154 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
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244
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155 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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156 ngx_close_file_n " \"%s\" failed", path.data);
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157 }
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158
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159 return NGX_DECLINED;
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160 }
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161
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388
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162 r->root_tested = 1;
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163
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244
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164 start = 0;
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332
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165 len = of.size;
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246
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166 i = 1;
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244
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167
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168 if (r->args.len) {
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340
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169 p = (u_char *) ngx_strnstr(r->args.data, "start=", r->args.len);
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244
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170
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171 if (p) {
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172 p += 6;
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173
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388
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174 for (n = p; n < r->args.data + r->args.len; n++) {
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175 if (*n == '&') {
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176 break;
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177 }
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178 }
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179
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180 start = ngx_atoof(p, n - p);
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244
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181
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182 if (start == NGX_ERROR || start >= len) {
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183 start = 0;
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184 }
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185
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246
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186 if (start) {
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187 len = sizeof(ngx_flv_header) - 1 + len - start;
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188 i = 0;
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189 }
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244
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190 }
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191 }
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192
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193 log->action = "sending flv to client";
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194
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195 r->headers_out.status = NGX_HTTP_OK;
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246
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196 r->headers_out.content_length_n = len;
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332
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197 r->headers_out.last_modified_time = of.mtime;
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244
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198
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199 if (ngx_http_set_content_type(r) != NGX_OK) {
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200 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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201 }
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202
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246
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203 if (i == 0) {
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204 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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205 if (b == NULL) {
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206 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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207 }
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244
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208
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209 b->pos = ngx_flv_header;
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210 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
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211 b->memory = 1;
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244
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212
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213 out[0].buf = b;
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214 out[0].next = &out[1];
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250
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215
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216 } else {
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217 r->allow_ranges = 1;
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246
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218 }
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244
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219
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250
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220
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221 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
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222 if (b == NULL) {
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223 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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224 }
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225
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226 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
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227 if (b->file == NULL) {
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228 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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229 }
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230
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231 rc = ngx_http_send_header(r);
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232
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233 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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234 return rc;
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235 }
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236
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237 b->file_pos = start;
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332
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238 b->file_last = of.size;
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244
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239
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240 b->in_file = b->file_last ? 1: 0;
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241 b->last_buf = 1;
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242 b->last_in_chain = 1;
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243
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356
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244 b->file->fd = of.fd;
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244
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245 b->file->name = path;
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246 b->file->log = log;
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247
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248 out[1].buf = b;
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249 out[1].next = NULL;
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250
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246
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251 return ngx_http_output_filter(r, &out[i]);
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244
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252 }
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253
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254
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255 static char *
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256 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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257 {
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258 ngx_http_core_loc_conf_t *clcf;
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259
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260 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
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261 clcf->handler = ngx_http_flv_handler;
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262
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263 return NGX_CONF_OK;
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264 }
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