search
HomeBackend DevelopmentGolangHow to prevent '+' from escaping in go-echo

How to prevent '+' from escaping in go-echo

Feb 09, 2024 am 08:00 AM
go language

How to prevent + from escaping in go-echo

php editor Xigua will introduce to you how to prevent " " from escaping in go-echo. In the Go language, the common way to connect strings is to use " ", but when the string contains " ", the compiler will interpret it as an operator instead of a string concatenation operator, resulting in an error in string concatenation. In order to solve this problem, you can use the `url.QueryEscape` function to escape the special characters in the string to ensure the correctness of the string connection. In this way, we can effectively prevent " " escape problems in go-echo and improve the reliability and stability of the code.

Question content

I am using https://github.com/labstack/echo in one of my projects. I'm using c.queryparam to parse query parameters and their values. One of the values ​​contains symbols and converts them to space characters (which is correct). However, I want to preserve the characters in the value.

For example: http://localhost:8080?param=test test

fmt.Println(c.QueryParam("param"))

Now it outputs test test. However, I expect the output to be test test. Is this possible using c.queryparam?

Solution

You can write a custom helper function as shown below -

func CustomQueryParam(c echo.Context, name string) string {
    qParams := make(map[string]string)
    for _, singleQueryParamStr := range strings.Split(c.QueryString(), "&") {
        val := strings.Split(singleQueryParamStr, "=")
        qParams[val[0]] = val[1]
    }
    return qParams[name]
}

func TestGet(c echo.Context) error {
    param := CustomQueryParam(c, "param")
    fmt.Println(param)

    return c.JSON(http.StatusOK, map[string]interface{}{
        "message": "request is successful",
    })
}

Now the output is as you would expect. It prints test test. But what does customqueryparam actually do?

Okay, let’s explore this insight. Assume, the api call is -

http://localhost:8080?param=test1 test2&param2=test3

customqueryparam The function will take the echo.context instance and query parameter name as function parameters.

Then, within the for loop, the entire query string (i.e. param=test1 test2&param2=test3 in our case) is & split and stored into In the string slice created by the query parameter string ([]string{"param=test1 test2", "param2=test3"}).

After that, we iterate over each query parameter string and split it again into a string slice of two values, with the first value as the parameter name and the second value as the parameter value. For example, for the first query parameter string, the result output is as follows -

"param=test1 test2" => []string{"param", "test1 test2"}

Then, the first value (parameter name) is specified as the map key, and the second value (parameter value) is specified as the map value.

After completing the above process for each query string, the mapping value corresponding to the query parameter name (that is, the parameter of the function) will be returned.

An interesting fact about this custom function is that it returns an empty string if the query parameter is not found.

The above is the detailed content of How to prevent '+' from escaping in go-echo. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:stackoverflow. If there is any infringement, please contact admin@php.cn delete
Golang vs. Python: The Pros and ConsGolang vs. Python: The Pros and ConsApr 21, 2025 am 12:17 AM

Golangisidealforbuildingscalablesystemsduetoitsefficiencyandconcurrency,whilePythonexcelsinquickscriptinganddataanalysisduetoitssimplicityandvastecosystem.Golang'sdesignencouragesclean,readablecodeanditsgoroutinesenableefficientconcurrentoperations,t

Golang and C  : Concurrency vs. Raw SpeedGolang and C : Concurrency vs. Raw SpeedApr 21, 2025 am 12:16 AM

Golang is better than C in concurrency, while C is better than Golang in raw speed. 1) Golang achieves efficient concurrency through goroutine and channel, which is suitable for handling a large number of concurrent tasks. 2)C Through compiler optimization and standard library, it provides high performance close to hardware, suitable for applications that require extreme optimization.

Why Use Golang? Benefits and Advantages ExplainedWhy Use Golang? Benefits and Advantages ExplainedApr 21, 2025 am 12:15 AM

Reasons for choosing Golang include: 1) high concurrency performance, 2) static type system, 3) garbage collection mechanism, 4) rich standard libraries and ecosystems, which make it an ideal choice for developing efficient and reliable software.

Golang vs. C  : Performance and Speed ComparisonGolang vs. C : Performance and Speed ComparisonApr 21, 2025 am 12:13 AM

Golang is suitable for rapid development and concurrent scenarios, and C is suitable for scenarios where extreme performance and low-level control are required. 1) Golang improves performance through garbage collection and concurrency mechanisms, and is suitable for high-concurrency Web service development. 2) C achieves the ultimate performance through manual memory management and compiler optimization, and is suitable for embedded system development.

Is Golang Faster Than C  ? Exploring the LimitsIs Golang Faster Than C ? Exploring the LimitsApr 20, 2025 am 12:19 AM

Golang performs better in compilation time and concurrent processing, while C has more advantages in running speed and memory management. 1.Golang has fast compilation speed and is suitable for rapid development. 2.C runs fast and is suitable for performance-critical applications. 3. Golang is simple and efficient in concurrent processing, suitable for concurrent programming. 4.C Manual memory management provides higher performance, but increases development complexity.

Golang: From Web Services to System ProgrammingGolang: From Web Services to System ProgrammingApr 20, 2025 am 12:18 AM

Golang's application in web services and system programming is mainly reflected in its simplicity, efficiency and concurrency. 1) In web services, Golang supports the creation of high-performance web applications and APIs through powerful HTTP libraries and concurrent processing capabilities. 2) In system programming, Golang uses features close to hardware and compatibility with C language to be suitable for operating system development and embedded systems.

Golang vs. C  : Benchmarks and Real-World PerformanceGolang vs. C : Benchmarks and Real-World PerformanceApr 20, 2025 am 12:18 AM

Golang and C have their own advantages and disadvantages in performance comparison: 1. Golang is suitable for high concurrency and rapid development, but garbage collection may affect performance; 2.C provides higher performance and hardware control, but has high development complexity. When making a choice, you need to consider project requirements and team skills in a comprehensive way.

Golang vs. Python: A Comparative AnalysisGolang vs. Python: A Comparative AnalysisApr 20, 2025 am 12:17 AM

Golang is suitable for high-performance and concurrent programming scenarios, while Python is suitable for rapid development and data processing. 1.Golang emphasizes simplicity and efficiency, and is suitable for back-end services and microservices. 2. Python is known for its concise syntax and rich libraries, suitable for data science and machine learning.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MinGW - Minimalist GNU for Windows

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.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software