编写嵌入式 Web 服务器时如何正确构建 favicon.ico 响应
How to properly construct a favicon.ico response when writing an embedded web server
我正在尝试编写一个为其自己的网页提供服务的嵌入式应用程序，并且我想让网站图标行为正常工作。但是，我认为我错误地格式化了响应。为什么这不会在我的浏览器选项卡中生成收藏图标（我猜错了 Content-type 或类似的东西）。我可以完全控制响应的 headers & body 中出现的内容：
curl -v localhost:7777/favicon.ico
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 7777 (#0)
> GET /favicon.ico HTTP/1.1
> Host: localhost:7777
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Length: 1958
< Content-Type: text/html
<
* Connection #0 to host localhost left intact
<link rel="shortcut icon" href="data:image/gif;base64,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" />
您需要提供图片（PNG 或 ICO），而不是 HTML。
我正在尝试编写一个为其自己的网页提供服务的嵌入式应用程序，并且我想让网站图标行为正常工作。但是，我认为我错误地格式化了响应。为什么这不会在我的浏览器选项卡中生成收藏图标（我猜错了 Content-type 或类似的东西）。我可以完全控制响应的 headers & body 中出现的内容：
curl -v localhost:7777/favicon.ico
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 7777 (#0)
> GET /favicon.ico HTTP/1.1
> Host: localhost:7777
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Length: 1958
< Content-Type: text/html
<
* Connection #0 to host localhost left intact
<link rel="shortcut icon" href="data:image/gif;base64,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" />
您需要提供图片（PNG 或 ICO），而不是 HTML。