After upgrading go-zero from 1.7.3 to 1.7.4, httpx.Parse throws an error. How can this be fixed?

[mowocc]

go-zero 从1.7.3 升级到1.7.4 后 httpx.Parse 报错，当http请求参数中有空值时解析错误。

报错如下：

strconv.ParseInt: parsing "": invalid syntax

参数结构体如下：

type RequestPagination struct {
	Page     int `form:"page,optional"`
	PageSize int `form:"page_size,optional"`
}

请问是什么原因呢？或者做什么修改呢？

[mowocc]

当我尝试更新到最新的1.7.6版本，还是有同样的错误，请问这是什么原因引起的？应该怎样修复？

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When I try to update to the latest 1.7.6 version, I still get the same error. What is the cause of this? How should it be fixed?

[mowocc]

1. 已经找原因，为了支持浏览器get数组参数，自定义了JSON.stringify(array)处理get数组参数。
2. 因为1.7.4升级了数组参数解析方式，导致该写法无法被解析，只需要删除该处理就可以正常使用。

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1. The reason has been found. In order to support the browser's get array parameters, JSON.stringify(array) has been customized to handle the get array parameters.
2. Because 1.7.4 has upgraded the array parameter parsing method, this writing method cannot be parsed. You only need to delete this processing to use it normally.

[mowocc]

升级1.7.4版本后，optional可选参数修饰符不生效，导致所有数字类型的字段，在传递空值时报错。

比如以下结构体：

type UserInfoRequest struct {
	UserId  int32 `form:"user_id,optional"`
}

当请求参数传递了user_id 字段，但该字段值为空，会触发以下报错：

strconv.ParseInt: parsing "": invalid syntax

请官方查看一下该问题

[kevwan]

fixed in #4542