JSON 对象最大大小? [英] JSON object max size?

问题描述

使用 jquery，我可以像这样使用 ajax 将 json 对象从客户端发送到服务器:

Using jquery, I'm able to send json objects from client to server using ajax like this:

var strJSON = '{"event":[{
    "dates":[
        "2009-10-14","2009-10-15"],
   "teams":[
        {"id":"0","country":"USA","state":"CA","name":"California Polytechnic State University","subteam":""},
        {"id":"1","country":"USA","state":"CA","name":"California State University, Bakersfield","subteam":""},
        {"id":"2","country":"USA","state":"CA","name":"California State University, Fresno","subteam":""},
        {"id":"3","country":"USA","state":"CA","name":"California State University, Fullerton","subteam":""}]
}]}';

$.ajax({
    url: '../ajax/save_event',
    type: 'POST',
    data: { data : strJSON },
    dataType: 'json',
    timeout: 8000,
    cache: false
});

效果很好.但是如果 JSON 字符串变得更大(不确定确切的大小，但大约 5 倍大)，服务器收到的 $_POST 数据是空的.有人知道为什么吗?

It works well. But if the JSON string gets much bigger (not sure the exact size, but somewhere around 5x bigger), the $_POST data received by the server is empty. Anybody know why?

我正在使用 Apache/PHP/jquery.它发生在 IE 和 Firefox 中.是否有需要调整的配置设置?

I'm using Apache/PHP/jquery. It happens from both IE and Firefox. Is there a config setting somewhere I need to adjust?

这是一个无法通过的字符串示例:

Here's an example of a string that fails to make it through:

{"events":[{"dates":["2009-10-10","2009-10-11","2009-10-12"],"divisions":[{"level":"Collegiate","name":"Varsity","subdivision":"Division I","rounds":[],"teams":[{"id":"0","country":"USA","state":"CA","name":"California Polytechnic State University","subteam":""},{"id":"1","country":"USA","state":"CA","name":"California State University, Bakersfield","subteam":""},{"id":"2","country":"USA","state":"CA","name":"California State University, Fresno","subteam":""},{"id":"3","country":"USA","state":"CA","name":"California State University, Fullerton","subteam":""},{"id":"4","country":"USA","state":"CA","name":"Stanford University","subteam":""},{"id":"5","country":"USA","state":"CA","name":"University of California, Davis","subteam":""},{"id":"6","country":"USA","state":"CA","name":"San Francisco State University","subteam":""},{"id":"7","country":"USA","state":"CA","name":"Lassen Community College","subteam":""},{"id":"8","country":"USA","state":"CA","name":"Menlo College","subteam":""},{"id":"9","country":"USA","state":"CA","name":"Fresno Pacific University","subteam":""},{"id":"10","country":"USA","state":"CA","name":"Bakersfield","subteam":""},{"id":"11","country":"USA","state":"CA","name":"Buchanan","subteam":""},{"id":"12","country":"USA","state":"CA","name":"Campolindo-Moraga","subteam":""},{"id":"13","country":"USA","state":"CA","name":"Fremont-Sunnyvale","subteam":""},{"id":"14","country":"USA","state":"CA","name":"Ponderosa-Shingle Springs","subteam":""},{"id":"15","country":"USA","state":"CA","name":"West Covina","subteam":""},{"id":"16","country":"USA","state":"CA","name":"Gilroy","subteam":""},{"id":"17","country":"USA","state":"CA","name":"San José State University","subteam":""},{"id":"18","country":"USA","state":"CA","name":"University of California, Los Angeles","subteam":""},{"id":"19","country":"USA","state":"CA","name":"Sierra College","subteam":""},{"id":"20","country":"USA","state":"CA","name":"Selma","subteam":""},{"id":"21","country":"USA","state":"CA","name":"Liberty","subteam":""}],}]}]}

它是使用 json.org 的stringify"创建的:

It's created using json.org's "stringify":

var strJSON = JSON.stringify(oEvent);

进一步调查后，我将 dataType 更改为text"并尝试发送一长串数字.它一直工作到大约 3500 个字符然后阻塞(当我说阻塞"时，我的意思是请求以空 $_POST 到达服务器.)

Investigating further, I changed the dataType to "text" and tried sending a long string of numbers. It works up until ~3500 characters then chokes (and when I say "choke" I mean that the request arrives at the server with a null $_POST.)

我的 PHP post_max_size 是 64M，所以不是这样.有人建议使用 httpd.conf 中没有的 Apache 的LimitRequestBody"，所以我向它添加了LimitRequestBody 0"并重新启动了 Apache.这也没有帮助.

My PHP post_max_size is 64M, so that's not it. Someone suggested using Apache's "LimitRequestBody" which wasn't in httpd.conf, so I added "LimitRequestBody 0" to it and rebooted Apache. That didn't help either.

还有什么建议???

推荐答案

这可能是由于您的服务器配置造成的.检查 php.ini 设置 max_post_size 并确保它足够大以发布您的数据.还要检查您的 Web 服务器设置 - Apache 有一个 LimitRequestBody 指令，这可能会导致您的问题.最后，检查您的网络服务器和 PHP 错误日志，看看大帖子是否触发了任何错误.

This is probably due to your server's configuration. Check php.ini for the setting max_post_size and ensure that it is sufficiently large to post your data. Also check your web server settings - Apache has a LimitRequestBody directive which could be causing your problem. Finally, check your web server and PHP error logs to see if the large post is triggering any errors.

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