


Caching Woes with http.FileServer
The http.FileServer in the Go standard library has been known to exhibit caching issues, leading to stale content being served after file edits. A user encountered this problem and sought assistance.
Issue Description:
An application using http.FileServer was experiencing incorrect file content delivery, despite a changing Content-Length header. The content would only update after a server or system reboot.
Extended Investigation:
To rule out potential sources of caching, the user examined the application's code, but found no evidence of caching mechanisms. They also tested the application on different platforms (Windows, Ubuntu, OS X), with no change in behavior.
Solution: Avoid Virtual Box Shared Folders
After some investigation, the user discovered the culprit: Virtual Box shared folders. When files were served from a Virtual Box shared folder, the caching issue occurred. However, when the files were stored on the host system and served from there, the problem disappeared.
Cause:
The underlying issue is that Virtual Box shared folders appear to implement their own caching mechanism, which conflicts with the caching performed by http.FileServer. This leads to the stale content being served.
Recommendation:
To avoid this caching issue, it is recommended to store files intended for use in http.FileServer outside of Virtual Box shared folders. This ensures that the application's caching mechanism is the sole controller of content delivery, preventing stale content from being served.
The above is the detailed content of Why is http.FileServer Serving Stale Content When Using Virtual Box Shared Folders?. For more information, please follow other related articles on the PHP Chinese website!

OpenSSL, as an open source library widely used in secure communications, provides encryption algorithms, keys and certificate management functions. However, there are some known security vulnerabilities in its historical version, some of which are extremely harmful. This article will focus on common vulnerabilities and response measures for OpenSSL in Debian systems. DebianOpenSSL known vulnerabilities: OpenSSL has experienced several serious vulnerabilities, such as: Heart Bleeding Vulnerability (CVE-2014-0160): This vulnerability affects OpenSSL 1.0.1 to 1.0.1f and 1.0.2 to 1.0.2 beta versions. An attacker can use this vulnerability to unauthorized read sensitive information on the server, including encryption keys, etc.

The article explains how to use the pprof tool for analyzing Go performance, including enabling profiling, collecting data, and identifying common bottlenecks like CPU and memory issues.Character count: 159

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

The article discusses Go's reflect package, used for runtime manipulation of code, beneficial for serialization, generic programming, and more. It warns of performance costs like slower execution and higher memory use, advising judicious use and best

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

The article discusses using table-driven tests in Go, a method that uses a table of test cases to test functions with multiple inputs and outcomes. It highlights benefits like improved readability, reduced duplication, scalability, consistency, and a


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

WebStorm Mac version
Useful JavaScript development tools