Access to XMLHttpRequest at file from origin ‘null‘ has been blocked by CORS policy谷歌浏览器本地打开项目js文件报错

2024-04-06 22:39:29

Access to XMLHttpRequest at ‘file:///xxxxx/PQ.BaseInfo.proto’ from origin ‘null’ has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, chrome-untrusted, https.

报错信息

意思是：

CORS 策略已阻止从源“null”访问“文件路径”处的 XMLHttpRequest：跨源请求仅支持协议方案：http、data、chrome、chrome-extension、https。

原因及解决方法

显然，在 Chrome 中，如果您尝试读取本地数据文件、处理它、使用 javascript 等处理它并显示它，似乎会发生错误。

这次是在本地读取CSV数据并显示图形的程序，所以正好对应这个，没有显示错误。

似乎这个错误在 Chrome 中是默认设置的，但是你可以通过从终端使用命令选项打开 Chrome 来避免这个错误（允许读取、处理和显示本地文件）。

在mac中：

sudo /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --args -allow-file-access-from-files

系统将要求您输入密码，因此请输入您的 PC 密码并按 Enter。

然后打开了一个新的 Chrome 窗口，当我在该窗口中打开之前出现错误的文件时，它显示没有任何错误。

如果 Chrome 应用程序不直接位于 Applications 目录下（默认存储位置），请进行相应更改。

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