Question

我正试图从不同网站上的HTML页面中的Dropbox公共文件夹中调用JSONP调用（因此我需要jsonp来避免跨站点问题）。

我的javascript代码抱怨因为它获取HTML而不是JSON。

 $.ajax({
        url: "https://www.dropbox.com/s/fzqhnr39fq45ijh/gen_info.json?dl=0",
        jsonp: "callback",
        dataType: "jsonp",

        // Work with the response
        success: function( response ) {
            console.log( response ); // server response
        }
    });

如果我从firebug控制台复制确切的URL并尝试使用wget，我会得到正确的文件内容。但是，正如您所看到的，存在重定向。调试窗口的内容表明ajax正在尝试显示第一个URL的HTML而不是重定向

$wget -O try.txt 'https://www.dropbox.com/s/fzqhnr39fq45ijh/gen_info.json?dl=0&callback=jQuery31100535301754706522_1475816277772&_=1475816277773'
--2016-10-07 15:35:25--  https://www.dropbox.com/s/fzqhnr39fq45ijh/gen_info.json?dl=0&callback=jQuery31100535301754706522_1475816277772&_=1475816277773
Resolving www.dropbox.com... 108.160.172.238
Connecting to www.dropbox.com|108.160.172.238|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://dl.dropboxusercontent.com/content_link/OCqme2gZH9FE2dTWU3DATOHjkk3V7PpjPZZAp6N6hK7cztzhiRTflEh27aFDA8bK/file [following]
--2016-10-07 15:35:26--  https://dl.dropboxusercontent.com/content_link/OCqme2gZH9FE2dTWU3DATOHjkk3V7PpjPZZAp6N6hK7cztzhiRTflEh27aFDA8bK/file
Resolving dl.dropboxusercontent.com... 45.58.69.5
Connecting to dl.dropboxusercontent.com|45.58.69.5|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2698 (2.6K) [text/plain]
Saving to: `try.txt'

100%[======================================================================>] 2,698       --.-K/s   in 0s

2016-10-07 15:35:28 (426 MB/s) - `try.txt' saved [2698/2698]

我已经按照dropbox jsonp file的建议预先包装了json，但是ajax调用永远不会到达那个页面。

callback( {"HALLWF1": ["2016/10/07 15:05:00", "Hallett 1 Wind Farm", "SA1", "Wind", "-33.300303", "138.726975", 77.5, 94.5] )

有没有办法强制ajax遵循Dropbox重定向，还是我应该放弃并为json选择另一个主机？浏览器是firefox 45.2.0，如果这有所不同。

还在最新的chrome中测试，错误有

Refused to execute script from 'https://www.dropbox.com/s/fzqhnr39fq45ijh/gen_info.json?dl=0&callback=jQuery311040161567467680626_1475817828807&_=1475817828808' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.

Answer 1

默认情况下，这些www.dropbox.com/s/链接指向HTML预览页面，而不是文件内容本身。

您可以使用dl或raw参数明确控制此操作，如下所示：

https://www.dropbox.com/help/201

例如，对代码的这种轻微修改有效：

$.ajax({
        url: "https://www.dropbox.com/s/fzqhnr39fq45ijh/gen_info.json?raw=1",
        jsonp: "callback",
        dataType: "jsonp",

        // Work with the response
        success: function( response ) {
            console.log( response ); // server response
        }
    });

ajax不遵循dropbox重定向

1 个答案: