Centos系统安装 Webdis + Nginx

Webdis 主要是为 Redis 提供 HTTP 接口，使得通过 HTTP 即可直接操作Redis，极高的提升了效率。

webdis: A fast HTTP interface for Redis。

特点：

1、Simple HTTP
2、JSON(P) output, and other formats
3、Chunked pub/sub
4、Access Control by IP+mask or HTTP Auth

要对 Redis 进行复杂的逻辑操作，推荐使用 Nginx-Lua 模块， Lua 脚本 提供强大的功能 ，可以直接取代  PHP 脚本。

Ngx_Lua 模块的安装步骤：猛击这里

下面简单介绍一下 Webdis 的安装步骤：

$ git clone git://github.com/nicolasff/webdis.git
		
$ cd webdis

$ make

$ ./webdis &

可以看出，Webdis在安装运行上秉承了Redis的极简主义！

注意事项：

在make 操作时，可能会出现以下问题：

cc -c -O3 -Wall -Wextra -I. -Ijansson/src -Ihttp-parser -o webdis.o webdis.c
In file included from webdis.c:1:
server.h:4:19: error: event.h: No such file or directory
In file included from webdis.c:1:
server.h:14: error: field ‘ev’ has incomplete type
make: *** [webdis.o] Error 1

原因分析：缺少libevent-devel 包。

解决办法：yum install libevent-devel

配置 Nginx 反向代理：

使得请求可以直接被传送至Webdis服务器

location ~/GET/ {
    proxy_pass http://webdis;
}
location ~/INFO {
    proxy_pass http://webdis;
}
upstream webdis {
    server 127.0.0.1:7379;
}

Webdis测试：

在命令行模式下，输入：curl -v http://127.0.0.1:7379/SET/aa/bb

[root@localhost webdis]# curl -v http://127.0.0.1:7379/SET/aa/cc
* About to connect() to 127.0.0.1 port 7379 (#0)
*   Trying 127.0.0.1... connected
* Connected to 127.0.0.1 (127.0.0.1) port 7379 (#0)
> GET /SET/aa/cc HTTP/1.1
> User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.13.1.0 zlib/1.2.3 libidn/1.18 libssh2/1.2.2
> Host: 127.0.0.1:7379
> Accept: */*
> 
< HTTP/1.1 200 OK
< Server: Webdis
< Allow: GET,POST,PUT,OPTIONS
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Headers: *
< Content-Type: application/json
< ETag: "0db1124cf79ffeb80aff6d199d5822f8"
< Connection: Keep-Alive
< Content-Length: 19
< 
* Connection #0 to host 127.0.0.1 left intact
* Closing connection #0
{"SET":[true,"OK"]}

操作成功！

在浏览器上访问时，如 http://localhost/INFO，会提示保存为文件，出现这种问题时，有以下方式解决。

• http://localhost/INFO?type=json
  
  
• http://localhost/INFO?type=txt
  
  
• http://localhost/INFO.txt
  
  
• http://localhost/INFO.json     不支持

其他的数据格式，各位可以自己试。

成功后的结果如下：

redis_version:2.4.15
redis_git_sha1:00000000
redis_git_dirty:0
arch_bits:64
multiplexing_api:epoll
gcc_version:4.4.6
process_id:2811
uptime_in_seconds:9264
uptime_in_days:0
lru_clock:120413
used_cpu_sys:0.27
used_cpu_user:0.17
used_cpu_sys_children:0.08
used_cpu_user_children:0.01
connected_clients:6
connected_slaves:1
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0
used_memory:1984648
used_memory_human:1.89M
used_memory_rss:9461760
used_memory_peak:2001536
used_memory_peak_human:1.91M
mem_fragmentation_ratio:4.77
mem_allocator:jemalloc-3.0.0
loading:0
aof_enabled:1
changes_since_last_save:0
bgsave_in_progress:0
last_save_time:1343372169
bgrewriteaof_in_progress:0
total_connections_received:85
total_commands_processed:97
expired_keys:0
evicted_keys:0
keyspace_hits:64
keyspace_misses:2
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:94175
vm_enabled:0
role:master
aof_current_size:518985
aof_base_size:518985
aof_pending_rewrite:0
aof_buffer_length:0
aof_pending_bio_fsync:0
slave0:127.0.0.1,36806,online
db0:keys=3,expires=0