Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_rewrite_handler.c @ 312:f5431a4bbc7d
nginx-0.0.3-2004-04-13-09:27:03 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 13 Apr 2004 05:27:03 +0000 |
parents | 87e73f067470 |
children | 7c3323909107 |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #define NGX_HTTP_REWRITE_COPY_MATCH 0 #define NGX_HTTP_REWRITE_COPY_SHORT 1 #define NGX_HTTP_REWRITE_COPY_LONG 2 typedef struct { ngx_int_t op; size_t len; uintptr_t data; } ngx_http_rewrite_op_t; typedef struct { ngx_regex_t *regex; ngx_uint_t msize; ngx_array_t ops; ngx_uint_t size; ngx_str_t re_name; ngx_str_t s_name; unsigned last:1; } ngx_http_rewrite_rule_t; typedef struct { ngx_array_t rules; unsigned log:1; } ngx_http_rewrite_srv_conf_t; static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_rewrite_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_int_t ngx_http_rewrite_init(ngx_cycle_t *cycle); static ngx_command_t ngx_http_rewrite_commands[] = { { ngx_string("rewrite"), NGX_HTTP_SRV_CONF|NGX_CONF_TAKE23, ngx_http_rewrite_rule, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; ngx_http_module_t ngx_http_rewrite_module_ctx = { NULL, /* pre conf */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_http_rewrite_create_loc_conf, /* create server configuration */ NULL, /* merge server configuration */ NULL, /* create location configration */ NULL, /* merge location configration */ }; ngx_module_t ngx_http_rewrite_module = { NGX_MODULE, &ngx_http_rewrite_module_ctx, /* module context */ ngx_http_rewrite_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_rewrite_init, /* init module */ NULL /* init child */ }; static ngx_int_t ngx_http_rewrite_handler(ngx_http_request_t *r) { int *matches; u_char *p; size_t len; uintptr_t data; ngx_int_t rc; ngx_uint_t i, m, n; ngx_str_t uri; ngx_http_rewrite_op_t *op; ngx_http_rewrite_rule_t *rule; ngx_http_rewrite_srv_conf_t *scf; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http rewrite handler"); scf = ngx_http_get_module_srv_conf(r, ngx_http_rewrite_module); rule = scf->rules.elts; for (i = 0; i < scf->rules.nelts; i++) { if (rule[i].msize) { if (!(matches = ngx_palloc(r->pool, rule[i].msize * sizeof(int)))) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } else { matches = NULL; } rc = ngx_regex_exec(rule[i].regex, &r->uri, matches, rule[i].msize); if (rc == NGX_DECLINED) { if (scf->log) { ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0, "\"%s\" does not match", rule[i].re_name.data); } continue; } if (rc < 0) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, ngx_regex_exec_n " failed: %d on \"%s\" using \"%s\"", rc, r->uri.data, rule[i].re_name.data); return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (scf->log) { ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0, "\"%s\" matches", rule[i].re_name.data); } uri.len = rule[i].size; for (n = 1; n < (ngx_uint_t) rc; n++) { uri.len += matches[2 * n + 1] - matches[2 * n]; } if (!(uri.data = ngx_palloc(r->pool, uri.len + 1))) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } p = uri.data; op = rule[i].ops.elts; for (n = 0; n < rule[i].ops.nelts; n++) { if (op[n].op == NGX_HTTP_REWRITE_COPY_SHORT) { len = op[n].len; data = op[n].data; while (len--) { *p++ = (char) (data & 0xff); data >>= 8; } } else if (op[n].op == NGX_HTTP_REWRITE_COPY_LONG) { p = ngx_cpymem(p, (void *) op[n].data, op[n].len); } else { /* NGX_HTTP_REWRITE_COPY_MATCH */ m = 2 * op[n].data; p = ngx_cpymem(p, &r->uri.data[matches[m]], matches[m + 1] - matches[m]); } } *p = '\0'; if (scf->log) { ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0, "rewritten uri: \"%s\"", uri.data); } r->uri = uri; if (ngx_http_set_exten(r) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (rule[i].last) { return NGX_DECLINED; } } return NGX_DECLINED; } static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf) { ngx_http_rewrite_srv_conf_t *conf; if (!(conf = ngx_palloc(cf->pool, sizeof(ngx_http_rewrite_srv_conf_t)))) { return NGX_CONF_ERROR; } ngx_init_array(conf->rules, cf->pool, 5, sizeof(ngx_http_rewrite_rule_t), NGX_CONF_ERROR); conf->log = 1; return conf; } static char *ngx_http_rewrite_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_rewrite_srv_conf_t *scf = conf; u_char *data, *p; size_t len; ngx_str_t *value, err; ngx_uint_t i; ngx_http_rewrite_op_t *op; ngx_http_rewrite_rule_t *rule; u_char errstr[NGX_MAX_CONF_ERRSTR]; if (!(rule = ngx_push_array(&scf->rules))) { return NGX_CONF_ERROR; } ngx_init_array(rule->ops, cf->pool, 5, sizeof(ngx_http_rewrite_op_t), NGX_CONF_ERROR); rule->msize = 0; rule->size = 0; value = cf->args->elts; /* STUB */ { err.len = NGX_MAX_CONF_ERRSTR; err.data = errstr; rule->regex = ngx_regex_compile(&value[1], 0, cf->pool, &err); if (rule->regex == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data); return NGX_CONF_ERROR; } rule->re_name = value[1]; rule->s_name = value[2]; for (i = 0; i < value[2].len; /* void */) { if (!(op = ngx_push_array(&rule->ops))) { return NGX_CONF_ERROR; } data = &value[2].data[i]; if (value[2].data[i] == '$' && i < value[2].len && value[2].data[i + 1] >= '1' && value[2].data[i + 1] <= '9') { op->op = NGX_HTTP_REWRITE_COPY_MATCH; op->data = value[2].data[++i] - '0'; if (rule->msize < op->data) { rule->msize = op->data; } i++; } else { i++; while (i < value[2].len && value[2].data[i] != '$') { i++; } len = &value[2].data[i] - data; rule->size += len; if (len) { op->len = len; if (len <= sizeof(uintptr_t)) { op->op = NGX_HTTP_REWRITE_COPY_SHORT; op->data = 0; while (len--) { op->data <<= 8; op->data |= data[len]; } } else { op->op = NGX_HTTP_REWRITE_COPY_LONG; if (!(p = ngx_palloc(cf->pool, len))) { return NGX_CONF_ERROR; } ngx_memcpy(p, data, len); op->data = (uintptr_t) p; } } } } if (rule->msize) { rule->msize++; rule->msize *= 3; } if (cf->args->nelts > 3) { if (ngx_strcmp(value[3].data, "last") == 0) { rule->last = 1; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%s\"", value[3].data); return NGX_CONF_ERROR; } } } return NGX_CONF_OK; } static ngx_int_t ngx_http_rewrite_init(ngx_cycle_t *cycle) { ngx_http_handler_pt *h; ngx_http_conf_ctx_t *ctx; ngx_http_core_main_conf_t *cmcf; ctx = (ngx_http_conf_ctx_t *) cycle->conf_ctx[ngx_http_module.index]; cmcf = ctx->main_conf[ngx_http_core_module.ctx_index]; h = ngx_push_array(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_rewrite_handler; return NGX_OK; }