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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
/* STUB */ #include <ngx_event_connect.h>
#include <ngx_http.h>
#include <ngx_http_proxy_handler.h>
static void ngx_http_proxy_send_request(ngx_event_t *wev);
static void ngx_http_proxy_close_connection(ngx_connection_t *c);
static ngx_chain_t *ngx_http_proxy_copy_request_hunks(ngx_http_proxy_ctx_t *p);
static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf);
static ngx_command_t ngx_http_proxy_commands[] = {
ngx_null_command
};
ngx_http_module_t ngx_http_proxy_module_ctx = {
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_proxy_create_loc_conf, /* create location configration */
#if 0
ngx_http_proxy_merge_conf /* merge location configration */
#endif
NULL
};
ngx_module_t ngx_http_proxy_module = {
NGX_MODULE,
&ngx_http_proxy_module_ctx, /* module context */
ngx_http_proxy_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init module */
NULL /* init child */
};
#if 0
static
#endif
int ngx_http_proxy_handler(ngx_http_request_t *r)
{
int rc;
ngx_http_proxy_ctx_t *p;
ngx_http_proxy_loc_conf_t *lcf;
ngx_http_create_ctx(r, p, ngx_http_proxy_module,
sizeof(ngx_http_proxy_ctx_t),
NGX_HTTP_INTERNAL_SERVER_ERROR);
p->lcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
#if 0
create_request;
#endif
p->action = "connecting to upstream";
p->request = r;
p->upstream.peers = p->lcf->peers;
p->upstream.tries = p->lcf->peers->number;
/* TODO: log->data would be changed, how to restore log->data ? */
p->upstream.log = r->connection->log;
for ( ;; ) {
rc = ngx_event_connect_peer(&p->upstream);
if (rc == NGX_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (rc == NGX_CONNECT_ERROR) {
ngx_event_connect_peer_failed(&p->upstream);
if (p->upstream.tries == 0) {
return NGX_HTTP_BAD_GATEWAY;
}
}
p->upstream.connection->data = p;
p->upstream.connection->write->event_handler =
ngx_http_proxy_send_request;
p->upstream.connection->read->event_handler = /* STUB */ NULL;
if (p->upstream.tries > 1) {
ngx_test_null(p->work_request_hunks,
ngx_http_proxy_copy_request_hunks(p),
NGX_HTTP_INTERNAL_SERVER_ERROR);
} else {
p->work_request_hunks = p->request_hunks;
}
if (rc == NGX_OK) {
ngx_http_proxy_send_request(p->upstream.connection->write);
return NGX_OK;
}
/* rc == NGX_AGAIN */
/* timer */
/* TODO */ return NGX_OK;
}
}
static void ngx_http_proxy_send_request(ngx_event_t *wev)
{
int rc;
ngx_chain_t *chain;
ngx_connection_t *c;
ngx_http_proxy_ctx_t *p;
c = wev->data;
p = c->data;
for ( ;; ) {
chain = ngx_write_chain(c, p->request_hunks);
if (chain == (ngx_chain_t *) -1) {
ngx_http_proxy_close_connection(c);
for ( ;; ) {
rc = ngx_event_connect_peer(&p->upstream);
if (rc == NGX_ERROR) {
ngx_http_finalize_request(p->request,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
if (rc == NGX_CONNECT_ERROR) {
ngx_event_connect_peer_failed(&p->upstream);
if (p->upstream.tries == 0) {
return;
}
}
if (p->upstream.tries > 1) {
ngx_test_null(p->work_request_hunks,
ngx_http_proxy_copy_request_hunks(p),
/* void */);
} else {
p->work_request_hunks = p->request_hunks;
}
if (rc == NGX_OK) {
c = p->connection;
wev = c->write;
break;
}
/* rc == NGX_AGAIN */
return;
}
} else {
p->work_request_hunks = chain;
ngx_del_timer(wev);
if (chain) {
ngx_add_timer(wev, p->lcf->send_timeout);
wev->timer_set = 1;
} else {
wev->timer_set = 0;
/* TODO: del event */
}
return;
}
}
}
static void ngx_http_proxy_close_connection(ngx_connection_t *c)
{
return;
}
static ngx_chain_t *ngx_http_proxy_copy_request_hunks(ngx_http_proxy_ctx_t *p)
{
ngx_chain_t *ce, *te, *fe, **le;
#if (NGX_SUPPRESS_WARN)
le = NULL;
#endif
ngx_test_null(fe, ngx_alloc_chain_entry(p->request->pool), NULL);
te = fe;
for (ce = p->request_hunks; ce; ce = ce->next) {
te->hunk = ce->hunk;
*le = te;
le = &te->next;
ce->hunk->pos = ce->hunk->start;
ngx_test_null(te, ngx_alloc_chain_entry(p->request->pool), NULL);
}
*le = NULL;
return fe;
}
static size_t ngx_http_proxy_log_error(void *data, char *buf, size_t len)
{
ngx_http_proxy_ctx_t *p = data;
return ngx_snprintf(buf, len,
" while %s, upstream: %s, client: %s, URL: %s",
p->action,
p->upstream.peers->peers[p->upstream.cur_peer].addr_port_text.data,
p->request->connection->addr_text.data,
p->request->unparsed_uri.data);
}
static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_proxy_loc_conf_t *conf;
ngx_test_null(conf,
ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t)),
NGX_CONF_ERROR);
/* STUB */
ngx_test_null(conf->peers, ngx_pcalloc(cf->pool, sizeof(ngx_peers_t)),
NGX_CONF_ERROR);
conf->peers->number = 1;
conf->peers->peers[0].addr = inet_addr("127.0.0.1");
conf->peers->peers[0].host.data = "localhost";
conf->peers->peers[0].host.len = sizeof("localhost") - 1;
conf->peers->peers[0].port = htons(9000);
conf->peers->peers[0].addr_port_text.data = "127.0.0.1:9000";
conf->peers->peers[0].addr_port_text.len = sizeof("127.0.0.1:9000") - 1;
conf->send_timeout = 30000;
/* */
return conf;
}
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