您可以尝试JavaScript重定向onsubmit事件。
为避免空搜索，请使用属性required作为输入。

You may try a javascript redirection for onsubmit event. To avoid empty searches, use the attribute "required" for the input.

示例：

Example:

<form onsubmit="window.location = 'http://domain.ca/blog/search/' + search.value; return false;">
<input id="search" placeholder="Search" type="search" name="search"></input>
<input type="submit" value="Send">
</form>