Mercurial > hg > nginx-vendor-0-7
diff src/imap/ngx_imap_auth_http_module.c @ 76:da9a3b14312d NGINX_0_1_38
nginx 0.1.38
*) Feature: the "limit_rate" directive is supported in in proxy and
FastCGI mode.
*) Feature: the "X-Accel-Limit-Rate" response header line is supported
in proxy and FastCGI mode.
*) Feature: the "break" directive.
*) Feature: the "log_not_found" directive.
*) Bugfix: the response status code was not changed when request was
redirected by the ""X-Accel-Redirect" header line.
*) Bugfix: the variables set by the "set" directive could not be used
in SSI.
*) Bugfix: the segmentation fault may occurred if the SSI page has more
than one remote subrequest.
*) Bugfix: nginx treated the backend response as invalid if the status
line in the header was transferred in two packets; bug appeared in
0.1.29.
*) Feature: the "ssi_types" directive.
*) Feature: the "autoindex_exact_size" directive.
*) Bugfix: the ngx_http_autoindex_module did not support the long file
names in UTF-8.
*) Feature: the IMAP/POP3 proxy.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Fri, 08 Jul 2005 00:00:00 +0400 |
parents | |
children | e916a291e9aa |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/src/imap/ngx_imap_auth_http_module.c @@ -0,0 +1,1067 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_event_connect.h> +#include <ngx_imap.h> + + +typedef struct { + ngx_peers_t *peers; + + ngx_msec_t timeout; + + ngx_str_t host_header; + ngx_str_t uri; +} ngx_imap_auth_http_conf_t; + + +typedef struct ngx_imap_auth_http_ctx_s ngx_imap_auth_http_ctx_t; + +typedef void (*ngx_imap_auth_http_handler_pt)(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx); + +struct ngx_imap_auth_http_ctx_s { + ngx_buf_t *request; + ngx_buf_t *response; + ngx_peer_connection_t peer; + + ngx_imap_auth_http_handler_pt handler; + + ngx_uint_t state; + ngx_uint_t hash; /* no needed ? */ + + u_char *header_name_start; + u_char *header_name_end; + u_char *header_start; + u_char *header_end; + + ngx_str_t addr; + ngx_str_t port; + ngx_str_t err; + + ngx_msec_t sleep; + + ngx_peers_t *peers; +}; + + +static void ngx_imap_auth_http_write_handler(ngx_event_t *wev); +static void ngx_imap_auth_http_read_handler(ngx_event_t *rev); +static void ngx_imap_auth_http_ignore_status_line(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx); +static void ngx_imap_auth_http_process_headers(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx); +static void ngx_imap_auth_sleep_handler(ngx_event_t *rev); +static ngx_int_t ngx_imap_auth_http_parse_header_line(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx); +static void ngx_imap_auth_http_block_read(ngx_event_t *rev); +static void ngx_imap_auth_http_dummy_handler(ngx_event_t *ev); +static ngx_buf_t *ngx_imap_auth_http_create_request(ngx_imap_session_t *s, + ngx_imap_auth_http_conf_t *ahcf); + +static void *ngx_imap_auth_http_create_conf(ngx_conf_t *cf); +static char *ngx_imap_auth_http_merge_conf(ngx_conf_t *cf, void *parent, + void *child); +static char *ngx_imap_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); + + +static ngx_command_t ngx_imap_auth_http_commands[] = { + + { ngx_string("auth_http"), + NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1, + ngx_imap_auth_http, + NGX_IMAP_SRV_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("auth_http_timeout"), + NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_msec_slot, + NGX_IMAP_SRV_CONF_OFFSET, + offsetof(ngx_imap_auth_http_conf_t, timeout), + NULL }, + + ngx_null_command +}; + + +static ngx_imap_module_t ngx_imap_auth_http_module_ctx = { + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + ngx_imap_auth_http_create_conf, /* create server configuration */ + ngx_imap_auth_http_merge_conf /* merge server configuration */ +}; + + +ngx_module_t ngx_imap_auth_http_module = { + NGX_MODULE_V1, + &ngx_imap_auth_http_module_ctx, /* module context */ + ngx_imap_auth_http_commands, /* module directives */ + NGX_IMAP_MODULE, /* module type */ + NULL, /* init module */ + NULL /* init process */ +}; + + +static char *ngx_imap_auth_http_protocol[] = { "pop3", "imap" }; + + +void +ngx_imap_auth_http_init(ngx_imap_session_t *s) +{ + ngx_int_t rc; + ngx_imap_auth_http_ctx_t *ctx; + ngx_imap_auth_http_conf_t *ahcf; + + ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_imap_auth_http_ctx_t)); + if (ctx == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + ahcf = ngx_imap_get_module_srv_conf(s, ngx_imap_auth_http_module); + + ctx->request = ngx_imap_auth_http_create_request(s, ahcf); + if (ctx->request == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + ngx_imap_set_ctx(s, ctx, ngx_imap_auth_http_module); + + ctx->peer.peers = ahcf->peers; + ctx->peer.log = s->connection->log; + ctx->peer.log_error = NGX_ERROR_ERR; + + rc = ngx_event_connect_peer(&ctx->peer); + + if (rc == NGX_ERROR) { + ngx_imap_session_internal_server_error(s); + return; + } + + ctx->peer.connection->data = s; + ctx->peer.connection->pool = s->connection->pool; + + s->connection->read->handler = ngx_imap_auth_http_block_read; + ctx->peer.connection->read->handler = ngx_imap_auth_http_read_handler; + ctx->peer.connection->write->handler = ngx_imap_auth_http_write_handler; + + ctx->handler = ngx_imap_auth_http_ignore_status_line; + + if (rc == NGX_OK) { + ngx_imap_auth_http_write_handler(ctx->peer.connection->write); + return; + } + + ngx_add_timer(ctx->peer.connection->read, ahcf->timeout); + ngx_add_timer(ctx->peer.connection->write, ahcf->timeout); +} + + +static void +ngx_imap_auth_http_write_handler(ngx_event_t *wev) +{ + ssize_t n, size; + ngx_connection_t *c; + ngx_imap_session_t *s; + ngx_imap_auth_http_ctx_t *ctx; + ngx_imap_auth_http_conf_t *ahcf; + + c = wev->data; + s = c->data; + + ctx = ngx_imap_get_module_ctx(s, ngx_imap_auth_http_module); + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, wev->log, 0, + "imap auth http write handler"); + + if (wev->timedout) { + ngx_log_error(NGX_LOG_ERR, wev->log, NGX_ETIMEDOUT, + "auth http server timed out"); + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + return; + } + + size = ctx->request->last - ctx->request->pos; + + n = ngx_send(c, ctx->request->pos, size); + + if (n == NGX_ERROR) { + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + return; + } + + if (n > 0) { + ctx->request->pos += n; + + if (n == size) { + wev->handler = ngx_imap_auth_http_dummy_handler; + + if (wev->timer_set) { + ngx_del_timer(wev); + } + + return; + } + } + + if (!wev->timer_set) { + ahcf = ngx_imap_get_module_srv_conf(s, ngx_imap_auth_http_module); + ngx_add_timer(wev, ahcf->timeout); + } +} + + +static void +ngx_imap_auth_http_read_handler(ngx_event_t *rev) +{ + ssize_t n, size; + ngx_connection_t *c; + ngx_imap_session_t *s; + ngx_imap_auth_http_ctx_t *ctx; + + c = rev->data; + s = c->data; + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, + "imap auth http read handler"); + + ctx = ngx_imap_get_module_ctx(s, ngx_imap_auth_http_module); + + if (rev->timedout) { + ngx_log_error(NGX_LOG_ERR, rev->log, NGX_ETIMEDOUT, + "auth http server timed out"); + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + return; + } + + if (ctx->response == NULL) { + ctx->response = ngx_create_temp_buf(s->connection->pool, 1024); + if (ctx->response == NULL) { + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + return; + } + } + + size = ctx->response->end - ctx->response->last; + + n = ngx_recv(c, ctx->response->pos, size); + + if (n > 0) { + ctx->response->last += n; + + ctx->handler(s, ctx); + return; + } + + if (n == NGX_AGAIN) { + return; + } + + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); +} + + +static void +ngx_imap_auth_http_ignore_status_line(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx) +{ + u_char *p, ch; + enum { + sw_start = 0, + sw_H, + sw_HT, + sw_HTT, + sw_HTTP, + sw_skip, + sw_almost_done + } state; + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, + "imap auth http process status line"); + + state = ctx->state; + + for (p = ctx->response->pos; p < ctx->response->last; p++) { + ch = *p; + + switch (state) { + + /* "HTTP/" */ + case sw_start: + if (ch == 'H') { + state = sw_H; + break; + } + goto next; + + case sw_H: + if (ch == 'T') { + state = sw_HT; + break; + } + goto next; + + case sw_HT: + if (ch == 'T') { + state = sw_HTT; + break; + } + goto next; + + case sw_HTT: + if (ch == 'P') { + state = sw_HTTP; + break; + } + goto next; + + case sw_HTTP: + if (ch == '/') { + state = sw_skip; + break; + } + goto next; + + /* any text until end of line */ + case sw_skip: + switch (ch) { + case CR: + state = sw_almost_done; + + break; + case LF: + goto done; + } + break; + + /* end of status line */ + case sw_almost_done: + if (ch == LF) { + goto done; + } + + ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, + "auth http server sent invalid response"); + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + return; + } + } + + ctx->response->pos = p; + ctx->state = state; + + return; + +next: + + p = ctx->response->start - 1; + +done: + + ctx->response->pos = p + 1; + ctx->state = 0; + ctx->handler = ngx_imap_auth_http_process_headers; + ctx->handler(s, ctx); +} + + +static void +ngx_imap_auth_http_process_headers(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx) +{ + u_char *p; + size_t len, size; + ngx_int_t rc, port, n; + struct sockaddr_in *sin; + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, + "imap auth http process headers"); + + for ( ;; ) { + rc = ngx_imap_auth_http_parse_header_line(s, ctx); + + if (rc == NGX_OK) { + +#if (NGX_DEBUG) + { + ngx_str_t key, value; + + key.len = ctx->header_name_end - ctx->header_name_start; + key.data = ctx->header_name_start; + value.len = ctx->header_end - ctx->header_start; + value.data = ctx->header_start; + + ngx_log_debug2(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, + "auth http header: \"%V: %V\"", + &key, &value); + } +#endif + + len = ctx->header_name_end - ctx->header_name_start; + + if (len == sizeof("Auth-Status") - 1 + && ngx_strncasecmp(ctx->header_name_start, "Auth-Status", + sizeof("Auth-Status") - 1) == 0) + { + len = ctx->header_end - ctx->header_start; + + if (len == 2 + && ctx->header_start[0] == 'O' + && ctx->header_start[1] == 'K') + { + continue; + } + + if (s->protocol == NGX_IMAP_POP3_PROTOCOL) { + size = sizeof("-ERR") - 1 + len + sizeof(CRLF) - 1; + + } else { + size = s->tag.len + sizeof("NO") - 1 + len + + sizeof(CRLF) - 1; + } + + p = ngx_pcalloc(s->connection->pool, size); + if (p == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + ctx->err.data = p; + + if (s->protocol == NGX_IMAP_POP3_PROTOCOL) { + *p++ = '-'; *p++ = 'E'; *p++ = 'R'; *p++ = 'R'; + + } else { + p = ngx_cpymem(p, s->tag.data, s->tag.len); + *p++ = 'N'; *p++ = 'O'; + } + + *p++ = ' '; + p = ngx_cpymem(p, ctx->header_start, len); + *p++ = CR; *p++ = LF; + + ctx->err.len = p - ctx->err.data; + + continue; + } + + if (len == sizeof("Auth-Server") - 1 + && ngx_strncasecmp(ctx->header_name_start, "Auth-Server", + sizeof("Auth-Server") - 1) == 0) + { + ctx->addr.len = ctx->header_end - ctx->header_start; + ctx->addr.data = ctx->header_start; + + continue; + } + + if (len == sizeof("Auth-Port") - 1 + && ngx_strncasecmp(ctx->header_name_start, "Auth-Port", + sizeof("Auth-Port") - 1) == 0) + { + ctx->port.len = ctx->header_end - ctx->header_start; + ctx->port.data = ctx->header_start; + + continue; + } + + if (len == sizeof("Auth-User") - 1 + && ngx_strncasecmp(ctx->header_name_start, "Auth-User", + sizeof("Auth-User") - 1) == 0) + { + s->login.len = ctx->header_end - ctx->header_start; + s->login.data = ctx->header_start; + + continue; + } + + if (len == sizeof("Auth-Wait") - 1 + && ngx_strncasecmp(ctx->header_name_start, "Auth-Wait", + sizeof("Auth-Wait") - 1) == 0) + { + n = ngx_atoi(ctx->header_start, + ctx->header_end - ctx->header_start); + + if (n != NGX_ERROR) { + ctx->sleep = n; + } + + continue; + } + + /* ignore other headers */ + + continue; + } + + if (rc == NGX_DONE) { + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, + "auth http header done"); + + ngx_close_connection(ctx->peer.connection); + + if (ctx->err.len) { + (void) ngx_send(s->connection, ctx->err.data, ctx->err.len); + + if (ctx->sleep == 0) { + ngx_imap_close_connection(s->connection); + return; + } + + ngx_add_timer(s->connection->read, ctx->sleep * 1000); + + s->connection->read->handler = ngx_imap_auth_sleep_handler; + + return; + } + + if (ctx->addr.len == 0 || ctx->port.len == 0) { + ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, + "auth http server did not send server or port"); + ngx_imap_session_internal_server_error(s); + return; + } + + ctx->peers = ngx_pcalloc(s->connection->pool, sizeof(ngx_peers_t)); + if (ctx->peers == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + sin = ngx_pcalloc(s->connection->pool, sizeof(struct sockaddr_in)); + if (sin == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + sin->sin_family = AF_INET; + + port = ngx_atoi(ctx->port.data, ctx->port.len); + if (port == NGX_ERROR || port < 1 || port > 65536) { + ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, + "auth http server sent invalid server " + "port:\"%V\"", &ctx->port); + ngx_imap_session_internal_server_error(s); + return; + } + + sin->sin_port = htons((in_port_t) port); + + ctx->addr.data[ctx->addr.len] = '\0'; + sin->sin_addr.s_addr = inet_addr((char *) ctx->addr.data); + if (sin->sin_addr.s_addr == INADDR_NONE) { + ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, + "auth http server sent invalid server " + "address:\"%V\"", &ctx->addr); + ngx_imap_session_internal_server_error(s); + return; + } + + ctx->peers->number = 1; + + ctx->peers->peer[0].sockaddr = (struct sockaddr *) sin; + ctx->peers->peer[0].socklen = sizeof(struct sockaddr_in); + + len = ctx->addr.len + 1 + ctx->port.len; + + ctx->peers->peer[0].name.len = len; + + ctx->peers->peer[0].name.data = ngx_palloc(s->connection->pool, + len); + if (ctx->peers->peer[0].name.data == NULL) { + ngx_imap_session_internal_server_error(s); + return; + } + + len = ctx->addr.len; + + ngx_memcpy(ctx->peers->peer[0].name.data, ctx->addr.data, len); + + ctx->peers->peer[0].name.data[len++] = ':'; + + ngx_memcpy(ctx->peers->peer[0].name.data + len, + ctx->port.data, ctx->port.len); + + ctx->peers->peer[0].uri_separator = ""; + + ngx_imap_proxy_init(s, ctx->peers); + + return; + } + + if (rc == NGX_AGAIN ) { + return; + } + + /* rc == NGX_ERROR */ + + ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, + "auth http server sent invalid header in response"); + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + + return; + } +} + + +static void +ngx_imap_auth_sleep_handler(ngx_event_t *rev) +{ + ngx_connection_t *c; + ngx_imap_session_t *s; + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, "imap auth sleep handler"); + + c = rev->data; + s = c->data; + + if (rev->timedout) { + + rev->timedout = 0; + + if (s->protocol == NGX_IMAP_POP3_PROTOCOL) { + s->imap_state = ngx_pop3_start; + s->connection->read->handler = ngx_pop3_auth_state; + + } else { + s->imap_state = ngx_imap_start; + s->connection->read->handler = ngx_imap_auth_state; + } + + if (rev->ready) { + s->connection->read->handler(rev); + return; + } + + if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { + ngx_imap_close_connection(s->connection); + } + + return; + } + + if (rev->active) { + if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { + ngx_imap_close_connection(s->connection); + } + } +} + + +static ngx_int_t +ngx_imap_auth_http_parse_header_line(ngx_imap_session_t *s, + ngx_imap_auth_http_ctx_t *ctx) +{ + u_char c, ch, *p; + ngx_uint_t hash; + enum { + sw_start = 0, + sw_name, + sw_space_before_value, + sw_value, + sw_space_after_value, + sw_almost_done, + sw_header_almost_done + } state; + + state = ctx->state; + hash = ctx->hash; + + for (p = ctx->response->pos; p < ctx->response->last; p++) { + ch = *p; + + switch (state) { + + /* first char */ + case sw_start: + + switch (ch) { + case CR: + ctx->header_end = p; + state = sw_header_almost_done; + break; + case LF: + ctx->header_end = p; + goto header_done; + default: + state = sw_name; + ctx->header_name_start = p; + + c = (u_char) (ch | 0x20); + if (c >= 'a' && c <= 'z') { + hash = c; + break; + } + + if (ch >= '0' && ch <= '9') { + hash = ch; + break; + } + + return NGX_ERROR; + } + break; + + /* header name */ + case sw_name: + c = (u_char) (ch | 0x20); + if (c >= 'a' && c <= 'z') { + hash += c; + break; + } + + if (ch == ':') { + ctx->header_name_end = p; + state = sw_space_before_value; + break; + } + + if (ch == '-') { + hash += ch; + break; + } + + if (ch >= '0' && ch <= '9') { + hash += ch; + break; + } + + if (ch == CR) { + ctx->header_name_end = p; + ctx->header_start = p; + ctx->header_end = p; + state = sw_almost_done; + break; + } + + if (ch == LF) { + ctx->header_name_end = p; + ctx->header_start = p; + ctx->header_end = p; + goto done; + } + + return NGX_ERROR; + + /* space* before header value */ + case sw_space_before_value: + switch (ch) { + case ' ': + break; + case CR: + ctx->header_start = p; + ctx->header_end = p; + state = sw_almost_done; + break; + case LF: + ctx->header_start = p; + ctx->header_end = p; + goto done; + default: + ctx->header_start = p; + state = sw_value; + break; + } + break; + + /* header value */ + case sw_value: + switch (ch) { + case ' ': + ctx->header_end = p; + state = sw_space_after_value; + break; + case CR: + ctx->header_end = p; + state = sw_almost_done; + break; + case LF: + ctx->header_end = p; + goto done; + } + break; + + /* space* before end of header line */ + case sw_space_after_value: + switch (ch) { + case ' ': + break; + case CR: + state = sw_almost_done; + break; + case LF: + goto done; + default: + state = sw_value; + break; + } + break; + + /* end of header line */ + case sw_almost_done: + switch (ch) { + case LF: + goto done; + default: + return NGX_ERROR; + } + + /* end of header */ + case sw_header_almost_done: + switch (ch) { + case LF: + goto header_done; + default: + return NGX_ERROR; + } + } + } + + ctx->response->pos = p; + ctx->state = state; + ctx->hash = hash; + + return NGX_AGAIN; + +done: + + ctx->response->pos = p + 1; + ctx->state = sw_start; + ctx->hash = hash; + + return NGX_OK; + +header_done: + + ctx->response->pos = p + 1; + ctx->state = sw_start; + + return NGX_DONE; +} + + +static void +ngx_imap_auth_http_block_read(ngx_event_t *rev) +{ + ngx_connection_t *c; + ngx_imap_session_t *s; + ngx_imap_auth_http_ctx_t *ctx; + + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, rev->log, 0, + "imap auth http block read"); + + if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { + c = rev->data; + s = c->data; + + ctx = ngx_imap_get_module_ctx(s, ngx_imap_auth_http_module); + + ngx_close_connection(ctx->peer.connection); + ngx_imap_session_internal_server_error(s); + } +} + + +static void +ngx_imap_auth_http_dummy_handler(ngx_event_t *ev) +{ + ngx_log_debug0(NGX_LOG_DEBUG_IMAP, ev->log, 0, + "imap auth http dummy handler"); +} + + +static ngx_buf_t * +ngx_imap_auth_http_create_request(ngx_imap_session_t *s, + ngx_imap_auth_http_conf_t *ahcf) +{ + size_t len; + ngx_buf_t *b; + + len = sizeof("GET ") - 1 + ahcf->uri.len + sizeof(" HTTP/1.0" CRLF) - 1 + + sizeof("Host: ") - 1 + ahcf->host_header.len + sizeof(CRLF) - 1 + + sizeof("Auth-Method: plain" CRLF) - 1 + + sizeof("Auth-User: ") - 1 + s->login.len + sizeof(CRLF) - 1 + + sizeof("Auth-Pass: ") - 1 + s->passwd.len + sizeof(CRLF) - 1 + + sizeof("Auth-Protocol: imap" CRLF) - 1 + + sizeof("Auth-Login-Attempt: ") - 1 + NGX_INT_T_LEN + + sizeof(CRLF) - 1 + + sizeof("Client-IP: ") - 1 + s->connection->addr_text.len + + sizeof(CRLF) - 1 + + sizeof(CRLF) - 1; + + b = ngx_create_temp_buf(s->connection->pool, len); + if (b == NULL) { + return NULL; + } + + b->last = ngx_cpymem(b->last, "GET ", sizeof("GET ") - 1); + b->last = ngx_cpymem(b->last, ahcf->uri.data, ahcf->uri.len); + b->last = ngx_cpymem(b->last, " HTTP/1.0" CRLF, + sizeof(" HTTP/1.0" CRLF) - 1); + + b->last = ngx_cpymem(b->last, "Host: ", sizeof("Host: ") - 1); + b->last = ngx_cpymem(b->last, ahcf->host_header.data, + ahcf->host_header.len); + *b->last++ = CR; *b->last++ = LF; + + b->last = ngx_cpymem(b->last, "Auth-Method: plain" CRLF, + sizeof("Auth-Method: plain" CRLF) - 1); + + b->last = ngx_cpymem(b->last, "Auth-User: ", sizeof("Auth-User: ") - 1); + b->last = ngx_cpymem(b->last, s->login.data, s->login.len); + *b->last++ = CR; *b->last++ = LF; + + b->last = ngx_cpymem(b->last, "Auth-Pass: ", sizeof("Auth-Pass: ") - 1); + b->last = ngx_cpymem(b->last, s->passwd.data, s->passwd.len); + *b->last++ = CR; *b->last++ = LF; + + b->last = ngx_cpymem(b->last, "Auth-Protocol: ", + sizeof("Auth-Protocol: ") - 1); + b->last = ngx_cpymem(b->last, ngx_imap_auth_http_protocol[s->protocol], + sizeof("imap") - 1); + *b->last++ = CR; *b->last++ = LF; + + b->last = ngx_sprintf(b->last, "Auth-Login-Attempt: %ui" CRLF, + s->login_attempt); + + b->last = ngx_cpymem(b->last, "Client-IP: ", sizeof("Client-IP: ") - 1); + b->last = ngx_cpymem(b->last, s->connection->addr_text.data, + s->connection->addr_text.len); + *b->last++ = CR; *b->last++ = LF; + + /* add "\r\n" at the header end */ + *b->last++ = CR; *b->last++ = LF; + +#if (NGX_DEBUG) + { + ngx_str_t l; + + l.len = b->last - b->pos; + l.data = b->pos; + ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, + "imap auth http header:\n\"%V\"", &l); + } +#endif + + return b; +} + + +static void * +ngx_imap_auth_http_create_conf(ngx_conf_t *cf) +{ + ngx_imap_auth_http_conf_t *ahcf; + + ahcf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_auth_http_conf_t)); + if (ahcf == NULL) { + return NGX_CONF_ERROR; + } + + ahcf->timeout = NGX_CONF_UNSET_MSEC; + + return ahcf; +} + + +static char * +ngx_imap_auth_http_merge_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_imap_auth_http_conf_t *prev = parent; + ngx_imap_auth_http_conf_t *conf = child; + + if (conf->peers == NULL) { + conf->peers = prev->peers; + conf->host_header = prev->host_header; + conf->uri = prev->uri; + } + + ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000); + + return NGX_CONF_OK; +} + + +static char * +ngx_imap_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_imap_auth_http_conf_t *ahcf = conf; + + ngx_uint_t i; + ngx_str_t *value, *url; + ngx_inet_upstream_t inet_upstream; +#if (NGX_HAVE_UNIX_DOMAIN) + ngx_unix_domain_upstream_t unix_upstream; +#endif + + value = cf->args->elts; + + url = &value[1]; + + if (ngx_strncasecmp(url->data, "unix:", 5) == 0) { + +#if (NGX_HAVE_UNIX_DOMAIN) + + ngx_memzero(&unix_upstream, sizeof(ngx_unix_domain_upstream_t)); + + unix_upstream.name = *url; + unix_upstream.url = *url; + unix_upstream.uri_part = 1; + + ahcf->peers = ngx_unix_upstream_parse(cf, &unix_upstream); + if (ahcf->peers == NULL) { + return NGX_CONF_ERROR; + } + + ahcf->peers->peer[0].uri_separator = ":"; + + ahcf->host_header.len = sizeof("localhost") - 1; + ahcf->host_header.data = (u_char *) "localhost"; + ahcf->uri = unix_upstream.uri; + +#else + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "the unix domain sockets are not supported " + "on this platform"); + return NGX_CONF_ERROR; + +#endif + + } else { + ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t)); + + inet_upstream.name = *url; + inet_upstream.url = *url; + inet_upstream.default_port_value = 80; + inet_upstream.uri_part = 1; + + ahcf->peers = ngx_inet_upstream_parse(cf, &inet_upstream); + if (ahcf->peers == NULL) { + return NGX_CONF_ERROR; + } + + for (i = 0; i < ahcf->peers->number; i++) { + ahcf->peers->peer[i].uri_separator = ""; + } + + ahcf->host_header = inet_upstream.host_header; + ahcf->uri = inet_upstream.uri; + } + + return NGX_CONF_OK; +}