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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ngx_http_proxy_handler.h>
static int ngx_http_proxy_rewrite_location_header(ngx_http_proxy_ctx_t *p,
ngx_table_elt_t *loc);
int ngx_http_proxy_copy_header(ngx_http_proxy_ctx_t *p,
ngx_http_proxy_headers_in_t *headers_in)
{
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *ho, *h;
ngx_http_request_t *r;
r = p->request;
part = &headers_in->headers.part;
h = part->elts;
#if 0
h = headers_in->headers.elts;
for (i = 0; i < headers_in->headers.nelts; i++) {
#endif
for (i = 0 ; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
h = part->elts;
i = 0;
}
/* ignore some headers */
if (&h[i] == headers_in->connection) {
continue;
}
if (&h[i] == headers_in->x_pad) {
continue;
}
if (p->accel) {
if (&h[i] == headers_in->date
|| &h[i] == headers_in->accept_ranges) {
continue;
}
if (&h[i] == headers_in->x_accel_expires
&& !p->lcf->pass_x_accel_expires)
{
continue;
}
if (&h[i] == headers_in->server && !p->lcf->pass_server) {
continue;
}
if (&h[i] == headers_in->location) {
if (ngx_http_proxy_rewrite_location_header(p, &h[i])
== NGX_ERROR)
{
return NGX_ERROR;
}
continue;
}
}
/* "Content-Type" is handled specially */
if (&h[i] == headers_in->content_type) {
r->headers_out.content_type = &h[i];
r->headers_out.content_type->key.len = 0;
continue;
}
/* copy some header pointers and set up r->headers_out */
if (!(ho = ngx_list_push(&r->headers_out.headers))) {
return NGX_ERROR;
}
*ho = h[i];
if (&h[i] == headers_in->expires) {
r->headers_out.expires = ho;
continue;
}
if (&h[i] == headers_in->cache_control) {
r->headers_out.cache_control = ho;
continue;
}
if (&h[i] == headers_in->etag) {
r->headers_out.etag = ho;
continue;
}
if (&h[i] == headers_in->content_encoding) {
r->headers_out.content_encoding = ho;
continue;
}
if (&h[i] == headers_in->last_modified) {
r->headers_out.last_modified = ho;
/* TODO: update r->headers_out.last_modified_time */
continue;
}
/*
* ngx_http_header_filter() passes the following headers as is
* and does not handle them specially if they are set:
* r->headers_out.server,
* r->headers_out.date,
* r->headers_out.content_length
*/
if (&h[i] == headers_in->server) {
r->headers_out.server = ho;
continue;
}
if (&h[i] == headers_in->date) {
r->headers_out.date = ho;
continue;
}
if (&h[i] == headers_in->content_length) {
r->headers_out.content_length = ho;
r->headers_out.content_length_n = ngx_atoi(ho->value.data,
ho->value.len);
continue;
}
}
return NGX_OK;
}
static int ngx_http_proxy_rewrite_location_header(ngx_http_proxy_ctx_t *p,
ngx_table_elt_t *loc)
{
u_char *last;
ngx_table_elt_t *location;
ngx_http_request_t *r;
ngx_http_proxy_upstream_conf_t *uc;
r = p->request;
uc = p->lcf->upstream;
if (!(location = ngx_list_push(&r->headers_out.headers))) {
return NGX_ERROR;
}
if (uc->url.len > loc->value.len
|| ngx_rstrncmp(loc->value.data, uc->url.data, uc->url.len) != 0)
{
/*
* we do not set r->headers_out.location here to avoid the handling
* the local redirects without a host name by ngx_http_header_filter()
*/
*location = *loc;
return NGX_OK;
}
/* TODO: proxy_reverse */
r->headers_out.location = location;
location->key.len = 0;
location->key.data = NULL;
location->value.len = uc->location->len
+ (loc->value.len - uc->url.len) + 1;
if (!(location->value.data = ngx_palloc(r->pool, location->value.len))) {
return NGX_ERROR;
}
last = ngx_cpymem(location->value.data,
uc->location->data, uc->location->len);
ngx_cpystrn(last, loc->value.data + uc->url.len,
loc->value.len - uc->url.len + 1);
return NGX_OK;
}
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