Edge Acceleration
  • Site Acceleration
    • Overview
    • Access Control
      • Token authentication
        • Token Authentication
        • Authentication Method A
        • Authentication Method B
        • Authentication Method C
        • Authentication Method D
        • Authentication Method V
    • Smart Acceleration
    • Cache configuration
      • Overview
      • EdgeOne caching rules introduction
        • Content Cache Rules
        • Cache Key Introduction
        • Vary Feature
      • Cache Configuration
        • Custom Cache Key
        • Node Cache TTL
        • Status Code Cache TTL
        • Browser Cache TTL
        • Offline Caching
        • Cache Prefresh
      • Clear and Preheat Cach
        • Cache Purge
        • URL Pre-Warming
        • Prefetch M3U8
      • How to improve the Cache Hit Rate of EdgeOne
    • File Optimization
      • Content Compression
      • Smart Compression
    • Network Optimization
      • HTTP/2
      • HTTP/3(QUIC)
        • Overview
        • Enable HTTP/3
        • QUIC SDK
          • SDK Overview
          • SDK Download and Integration
          • Sample Code
            • Android
            • iOS
          • API Documentation
            • Android
            • iOS
      • IPv6 Access
      • Maximum Upload Size
      • WebSocket
      • Client IP Geolocation Header
      • Client IP Geographical Location
      • gRPC
      • Network Error Logging
    • URL Rewrite
      • Access URL Redirection
      • Origin-Pull URL Rewrite
    • Modifying Header
      • Modifying HTTP Response Headers
      • Modifying HTTP Request Headers
    • Modify response content
      • HTTP Response
      • Custom Error Page
    • Rules Engine
      • Overview
      • Rule Management
      • variables
      • Supported Matching Types and Actions
    • Image and video processing
      • Audio and Video Pre-pulling
      • Just-in-Time Image Processing
      • Video Just-In-Time Processing
      • VOD Media Origin
    • Speed limit for single connection download
    • Request and Response Actions
      • HTTP Response
      • Processing order
      • Default HTTP Headers of Origin-Pull Requests
      • Default HTTP Response Headers
      • HTTP Restrictions
    • Media Services
      • Audio and Video Pre-pulling
      • Just-in-Time Image Processing
      • Just-in-Time Media Processing
      • VOD Media Origin
  • L4 Proxy
    • Overview
    • Creating an L4 Proxy Instance
    • Modifying an L4 Proxy Instance
    • Disabling or Deleting an L4 Proxy Instance
    • Batch Configuring Forwarding Rules
    • Obtaining Real Client IPs
      • Obtaining Real TCP Client IPs via TOA
      • Obtaining Real Client IPs Through Protocol V1/V2
        • Overview
        • Method 1: Obtaining Real Client IPs Through Nginx
        • Method 2: Parsing Real Client IPs on Application Server
        • Format of Real Client IPs Obtained Through Proxy Protocol V1/V2
      • Transmitting Client Real IP via SPP Protocol
  • Domain name service and origin server configuration
    • Domain Name Services
      • Overview
      • DNS resolution for managed domains
        • Modifying DNS Servers
        • Configuring DNS Records
        • Batch Importing DNS Records
        • Advanced DNS Configuration
      • Access accelerated domains
        • Adding A Domain Name for Acceleration
        • Ownership Verification
        • Modifying CNAME Records
        • Verify Business Access
      • Traffic scheduling
        • Traffic Scheduling Management
    • HTTPS Certificate
      • Overview
      • Edge HTTPS Certificate
        • Overview
        • Deploying/Updating SSL Certificate for A Domain Name
        • Configuring A Free Certificate for A Domain Name
        • Using Keyless Certificate
      • Edge mTLS Authentication
      • Origin Certificate Validation
      • HTTPS configuration
        • Forced HTTPS Access
        • Enabling HSTS
        • SSL/TLS security configuration
          • Configuring SSL/TLS Security
          • TLS Versions and Cipher Suites
        • Enabling OCSP Stapling
      • Related References
        • Using OpenSSL to Generate Self-Signed Certificates
        • Certificate Format Requirements
        • The Difference Between one-way authentication and Mutual authentication
    • Origin Configuration
      • Load Balancing
        • Overview
        • Quickly Create Load Balancers
        • Health Check Policies
        • Viewing the Health Status of Origin Server
        • Related References
          • Load Balancing-Related Concepts
          • Introduction to Request Retry Strategy
      • Origin Group Configuration
      • Origin configuration
        • Origin-Pull Timeout
        • Configuring Origin-Pull HTTPS
        • Host Header Rewrite
        • Controlling Origin-pull Requests
        • Redirect Following During Origin-Pull
        • HTTP/2 Origin-Pull
        • Range GETs
        • Modify Origin
        • Origin-pull Rate Limiting Policy
      • Origin Protection(Obtaining/Updating Origin IP Address Range)
      • Related References
        • ld Version Origin Group Compatible Related Issues
Docs Overview/
Edge Acceleration/
Site Acceleration/
Request and Response Actions/
HTTP Restrictions/

HTTP Restrictions

This document will introduce the restrictions of EdgeOne on HTTP requests/responses in various dimensions and the response behaviors once these restrictions are exceeded.
Restriction Item
Description
Request header length (key + value)
The total size of the request header name and header value is restricted to 128 KB. If exceeded, the EdgeOne node will respond with a 413 status code.
Response header length (key + value)
The total size of the response header name and header value is restricted to 128 KB. If exceeded, the EdgeOne node will respond with a 413 status code.
Number of HTTP request headers
The total number of HTTP request headers is 256.
HTTP/1.1 requests: If exceeded, the EdgeOne node will respond with a 400 status code.
HTTP/2.0 requests: If exceeded, the EdgeOne node will send goaway and close the stream.
Number of HTTP response headers
The total number of HTTP response headers is 256.
HTTP/1.1 requests: If exceeded, the EdgeOne node will respond with a 400 status code.
HTTP/2.0 requests: If exceeded, the EdgeOne node will send goaway and close the stream.
Size of the header key or value for HTTP/2 requests
The size of a single header name or value is restricted to 32 KB. If exceeded, the EdgeOne node will send goaway and close the stream.
Maximum number of requests per HTTP/2 stream
Maximum number of requests per stream is 1000, no limit on origin requests.
aximum concurrency per HTTP/2 stream
Maximum concurrency per stream is 128
Request URL length
It is currently unrestricted, but will be restricted to 8192 B in the future.
Request body length
Upper limit of UInt64.
For the POST request upload body length limit, please refer to Maximum Upload Size.
Response body length
Upper limit of UInt64.
Cache size
It is currently unrestricted, but will be restricted to 30 GB in the future.
Request method
The supported methods only include GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT, OPTIONS, PATCH, COPY, LOCK, MKCOL, MOVE, PROPFIND, PROPPATCH, and UNLOCK. For requests with other methods, the EdgeOne node will directly respond with a 400 status code.