# HTTP Headers Pro

> Explains HTTP protocol, requests, responses, and status codes for web communication. (iPhone/iPad app by 正东 王.)

- Source: https://appshunter.io/ios/app/http-headers-pro/id1108327475 (this page in markdown: same URL + `.md`)
- Developer: [正东 王](https://appshunter.io/developer/533870496)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 5 MB
- Languages: American English
- Released: 2016-05-09
- Data updated: 2026-08-23
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/http-headers-pro/id1108327475/reviews.md

## What is HTTP Headers Pro?

HTTP是一个客户端终端（用户）和服务器端（网站）请求和应答的标准（TCP）。通过使用Web浏览器、网络爬虫或者其它的工具，客户端发起一个HTTP请求到服务器上指定端口（默认端口为80）。我们称这个客户端为用户代理程序（user agent）。应答的服务器上存储着一些资源，比如HTML文件和图像。我们称这个应答服务器为源服务器（origin server）。在用户代理和源服务器中间可能存在多个“中间层”，比如代理服务器、网关或者隧道（tunnel）。

尽管TCP/IP协议是互联网上最流行的应用，HTTP协议中，并没有规定必须使用它或它支持的层。事实上，HTTP可以在任何互联网协议上，或其他网络上实现。HTTP假定其下层协议提供可靠的传输。因此，任何能够提供这种保证的协议都可以被其使用。因此也就是其在TCP/IP协议族使用TCP作为其传输层。

通常，由HTTP客户端发起一个请求，创建一个到服务器指定端口（默认是80端口）的TCP连接。HTTP服务器则在那个端口监听客户端的请求。一旦收到请求，服务器会向客户端返回一个状态，比如"HTTP/1.1 200 OK"，以及返回的内容，如请求的文件、错误消息、或者其它信息。

所有HTTP响应的第一行都是状态行，依次是当前HTTP版本号，3位数字组成的状态代码，以及描述状态的短语，彼此由空格分隔。

状态代码的第一个数字代表当前响应的类型：

1xx消息——请求已被服务器接收，继续处理
2xx成功——请求已成功被服务器接收、理解、并接受
3xx重定向——需要后续操作才能完成这一请求
4xx请求错误——请求含有词法错误或者无法被执行
5xx服务器错误——服务器在处理某个正确请求时发生错误

## Key features

- HTTP request/response explanation
- Client-server communication standard
- Status code breakdown
- Message type descriptions
- Understanding web protocols

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/http-headers-pro/id1108327475/reviews.md

### 1/5 — Does nothing I can see

*2019-04-13*

What a waste of time

## Frequently asked questions about HTTP Headers Pro

### What is HTTP Headers Pro?

HTTP Headers Pro is a free utility app that explains the HTTP protocol, detailing the communication standards between clients and servers. It breaks down requests, responses, and status codes.

### What devices does HTTP Headers Pro support?

HTTP Headers Pro is available for iPhone and iPod devices.

### Is HTTP Headers Pro free to use?

Yes, HTTP Headers Pro is completely free to use and does not contain advertisements or in-app purchases.

### How often is HTTP Headers Pro updated?

The app was last updated on September 2, 2020, with the latest version being 2.0. It was initially released on May 9, 2016.

### What is the age rating for HTTP Headers Pro?

HTTP Headers Pro has an age rating of 4+, making it suitable for a wide range of users.

### Does HTTP Headers Pro have ads?

No, HTTP Headers Pro is ad-free. Users can access all its information without interruptions from advertisements.

### What kind of information does HTTP Headers Pro provide?

It provides detailed explanations of HTTP requests and responses, including the standard protocol, client-server interactions, and the meaning of various status codes (1xx, 2xx, 3xx, 4xx, 5xx).

## Version history (last 2 releases)

### 2.0 — 2020-09-02

1.  支持iOS13；
2. 支持iPhone X，iPhone XS，iPhone11等设备；
3. 修复BUG。

### 1.0 — 2016-05-09

此更新已使用 Apple 最新的签名证书签名。未包括任何新功能。

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All apps by 正东 王: https://appshunter.io/developer/533870496

## Related topics

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*