前言
最近在采用jquery ajax調用http請求時,發現了一系列問題:
如采用firebug調試API請求(這個API是自己服務器的應用),看到服務器明明返回200狀態,response返回數據也是json格式,但ajax返回的error。
在排除json數據格式不正確的原因之后,發現了ajax error函數返回“networkerror failed to execute ‘send' on ‘xmlhttprequest' failed to load ‘http //“ XMLHttpRequest.status=0,就是沒有初始化。
后來才知道是跨域問題(CORS),因為程序調用的是遠程服務器的API,服務器不允許跨域調用。如果只是簡單的方法,只需要在程序的response添加支持跨域的header添加屬性”Access-Control-Allow-Origin: *
“即可。
如java 服務器代碼:
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yourownvariable.setHeader("Access-Control-Allow-Origin:", "origin url of your site"); yourownvariable.setHeader("Access-Control-Allow-Methods", "GET, POST,PUT"); |
如果是配置nginx服務器(如果是其他服務器,可以參考:I want to add CORS support to my server),需要在nginx.conf配置文件添加一下內容:
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# # Wide-open CORS config for nginx # location / { if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; # # Custom headers and headers various browsers *should* be OK with but aren't # add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; # # Tell client that this pre-flight info is valid for 20 days # add_header 'Access-Control-Max-Age' 1728000; add_header 'Content-Type' 'text/plain charset=UTF-8'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; } } |
總結
以上就是這篇文章的全部內容了,希望本文的內容對大家的學習或者工作能帶來一定的幫助,如果有疑問大家可以留言交流,謝謝大家對服務器之家的支持。
原文鏈接:http://www.yoyong.com/archives/985