afs: Use nonblocking API for server commands.
[paraslash.git] / http_recv.c
index 0a460ad..636e224 100644 (file)
@@ -1,11 +1,12 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file http_recv.c paraslash's http receiver */
 
+#include <regex.h>
 #include <sys/types.h>
 #include <dirent.h>
 
 #include "http.h"
 #include "list.h"
 #include "sched.h"
+#include "ggo.h"
 #include "recv.h"
 #include "http_recv.cmdline.h"
 #include "net.h"
 #include "string.h"
 #include "fd.h"
-
-/** the output buffer size of the http receiver */
-#define BUFSIZE (32 * 1024)
+#include "buffer_tree.h"
 
 /**
  * the possible states of a http receiver node
 enum http_recv_status {HTTP_CONNECTED, HTTP_SENT_GET_REQUEST, HTTP_STREAMING};
 
 /**
- * data specific to the http receiver
+ * Data specific to the http receiver.
  *
  * Each running instance of the http receiver reserves space for one such struct.
  */
 struct private_http_recv_data {
-/**
- *
- *
- * the current status of the http receiver node
- *
- * It gets initialized to \p HTTP_CONNECTED by the open function of the
- * http receiver.
- *
- * \sa receiver::open, receiver_node.
- */
+       /**
+        * The current status of the http receiver node.
+        *
+        * It gets initialized to \p HTTP_CONNECTED by the open function of the
+        * http receiver.
+        *
+        * \sa receiver::open, receiver_node.
+        */
        enum http_recv_status status;
-/**
- *
- *
- * the file descriptor used for receiving the http stream
- *
- * The pre_select function of the http receiver adds this file descriptor to
- * the set of file decriptors which are checked for reading/writing (depending
- * on the current status) by the select loop of the application (para_audiod or
- * para_recv).
- *
- * The post_select function of the http receiver uses \a fd, if ready, to
- * establish the http connection, and updates \a status according to the new
- * state of the connection.  As soon as \a status is \p HTTP_STREAMING, \a fd is
- * going to be only checked for reading. If data is available, it is read into
- * the output buffer of the receiver node by post_select.
- *
- * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
- */
+       /**
+        * The file descriptor used for receiving the http stream.
+        *
+        * The pre_select function of the http receiver adds this file descriptor to
+        * the set of file decriptors which are checked for reading/writing (depending
+        * on the current status) by the select loop of the application (para_audiod or
+        * para_recv).
+        *
+        * The post_select function of the http receiver uses \a fd, if ready, to
+        * establish the http connection, and updates \a status according to the new
+        * state of the connection.  As soon as \a status is \p HTTP_STREAMING, \a fd is
+        * going to be only checked for reading. If data is available, it is read into
+        * the output buffer of the receiver node by post_select.
+        *
+        * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
+        */
        int fd;
+       struct btr_pool *btrp;
 };
 
-static void http_shutdown(void)
-{
-       return;
-}
-
 static char *make_request_msg(void)
 {
        char *ret, *hn = para_hostname();
@@ -84,72 +76,78 @@ static char *make_request_msg(void)
 
 static void http_recv_pre_select(struct sched *s, struct task *t)
 {
-       struct receiver_node *rn = t->private_data;
+       struct receiver_node *rn = container_of(t, struct receiver_node, task);
        struct private_http_recv_data *phd = rn->private_data;
 
-       t->ret = 1;
+       t->error = 0;
+       if (generic_recv_pre_select(s, t) <= 0)
+               return;
        if  (phd->status == HTTP_CONNECTED)
                para_fd_set(phd->fd, &s->wfds, &s->max_fileno);
        else
                para_fd_set(phd->fd, &s->rfds, &s->max_fileno);
 }
 
-
 static void http_recv_post_select(struct sched *s, struct task *t)
 {
-       struct receiver_node *rn = t->private_data;
+       struct receiver_node *rn = container_of(t, struct receiver_node, task);
        struct private_http_recv_data *phd = rn->private_data;
+       struct btr_node *btrn = rn->btrn;
+       int ret;
+       char *buf;
+       size_t sz;
 
-       t->ret = -E_HTTP_RECV_EOF;
-       if (rn->output_eof && *rn->output_eof)
-               goto out;
-       t->ret = 1;
-       if (!s->select_ret)
-               goto out;
-       if  (phd->status == HTTP_CONNECTED) {
+       t->error = 0;
+       ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
+       if (ret < 0)
+               goto err;
+       if (ret == 0)
+               return;
+       if (phd->status == HTTP_CONNECTED) {
                char *rq;
                if (!FD_ISSET(phd->fd, &s->wfds))
-                       goto out;
+                       return;
                rq = make_request_msg();
-               PARA_INFO_LOG("%s", "sending http request\n");
-               t->ret = send_va_buffer(phd->fd, "%s", rq);
+               PARA_INFO_LOG("sending http request\n");
+               ret = send_va_buffer(phd->fd, "%s", rq);
                free(rq);
-               if (t->ret > 0)
-                       phd->status = HTTP_SENT_GET_REQUEST;
-               goto out;
+               if (ret < 0)
+                       goto err;
+               phd->status = HTTP_SENT_GET_REQUEST;
+               return;
        }
-       if (!FD_ISSET(phd->fd, &s->rfds))
-               goto out;
        if (phd->status == HTTP_SENT_GET_REQUEST) {
-               t->ret = recv_pattern(phd->fd, HTTP_OK_MSG, MAXLINE);
-               if (t->ret < 0)
-                       goto out;
-               PARA_INFO_LOG("%s", "received ok msg, streaming\n");
-               t->ret = 1;
+               ret = read_pattern(phd->fd, HTTP_OK_MSG, strlen(HTTP_OK_MSG), &s->rfds);
+               if (ret < 0)
+                       goto err;
+               if (ret == 0)
+                       return;
+               PARA_INFO_LOG("received ok msg, streaming\n");
                phd->status = HTTP_STREAMING;
-               goto out;
+               return;
        }
-       t->ret = -E_HTTP_RECV_OVERRUN;
-       if (rn->loaded >= BUFSIZE)
-               goto out;
-       t->ret = recv_bin_buffer(phd->fd, rn->buf + rn->loaded,
-               BUFSIZE - rn->loaded);
-       if (t->ret <= 0) {
-               if (!t->ret)
-                       t->ret = -E_HTTP_RECV_EOF;
-               goto out;
-       }
-       rn->loaded += t->ret;
-out:
-       if (t->ret < 0)
-               rn->eof = 1;
+       ret = -E_HTTP_RECV_OVERRUN;
+       sz = btr_pool_get_buffer(phd->btrp, &buf);
+       if (sz == 0)
+               goto err;
+       ret = recv_bin_buffer(phd->fd, buf, sz);
+       if (ret == 0)
+               ret = -E_RECV_EOF;
+       if (ret < 0)
+               goto err;
+       btr_add_output_pool(phd->btrp, ret, btrn);
+       return;
+err:
+       btr_remove_node(rn->btrn);
+       t->error = ret;
 }
 
 static void http_recv_close(struct receiver_node *rn)
 {
        struct private_http_recv_data *phd = rn->private_data;
+
        close(phd->fd);
-       free(rn->buf);
+       btr_pool_free(phd->btrp);
        free(rn->private_data);
 }
 
@@ -166,52 +164,52 @@ static void *http_recv_parse_config(int argc, char **argv)
 static int http_recv_open(struct receiver_node *rn)
 {
        struct private_http_recv_data *phd;
-       struct hostent *he;
        struct http_recv_args_info *conf = rn->conf;
-       struct sockaddr_in their_addr;
-       int ret;
+       int fd, ret = para_connect_simple(IPPROTO_TCP, conf->host_arg,
+                                                      conf->port_arg);
 
-       rn->buf = para_calloc(BUFSIZE);
-       rn->private_data = para_calloc(sizeof(struct private_http_recv_data));
-       phd = rn->private_data;
-       ret = get_host_info(conf->host_arg, &he);
-       if (ret < 0)
-               goto err_out;
-       ret = get_stream_socket(AF_INET);
        if (ret < 0)
-               goto err_out;
-       phd->fd = ret;
-       /* init their_addr */
-       init_sockaddr(&their_addr, conf->port_arg, he);
-       PARA_NOTICE_LOG("connecting to %s:%d\n", conf->host_arg,
-               conf->port_arg);
-       ret = PARA_CONNECT(phd->fd, &their_addr);
+               return ret;
+       fd = ret;
+       ret = mark_fd_nonblocking(fd);
        if (ret < 0) {
-               close(phd->fd);
-               goto err_out;
+               close(fd);
+               return ret;
        }
-       mark_fd_nonblocking(phd->fd);
+       rn->private_data = phd = para_calloc(sizeof(struct private_http_recv_data));
+       phd->fd = fd;
        phd->status = HTTP_CONNECTED;
+       phd->btrp = btr_pool_new("http_recv", 320 * 1024);
        return 1;
-err_out:
-       free(rn->private_data);
-       free(rn->buf);
-       return ret;
+}
+
+static void http_recv_free_config(void *conf)
+{
+       http_recv_cmdline_parser_free(conf);
+       free(conf);
 }
 
 /**
- * the init function of the http receiver
+ * The init function of the http receiver.
  *
- * \param r pointer to the receiver struct to initialize
+ * \param r Pointer to the receiver struct to initialize.
  *
- * Just initialize all function pointers of \a r.
+ * This initializes all function pointers of \a r.
  */
 void http_recv_init(struct receiver *r)
 {
+       struct http_recv_args_info dummy;
+
+       http_recv_cmdline_parser_init(&dummy);
        r->open = http_recv_open;
        r->close = http_recv_close;
        r->pre_select = http_recv_pre_select;
        r->post_select = http_recv_post_select;
-       r->shutdown = http_shutdown;
        r->parse_config = http_recv_parse_config;
+       r->free_config = http_recv_free_config;
+       r->help = (struct ggo_help) {
+               .short_help = http_recv_args_info_help,
+               .detailed_help = http_recv_args_info_detailed_help
+       };
+       http_recv_cmdline_parser_free(&dummy);
 }