Response:getResponseCode()

从响应中获取 HTTP 状态码。

签名

getResponseCode(): number

返回值

number - HTTP 状态码（例如 200、404、500）

描述

getResponseCode() 方法返回服务器响应中的 HTTP 状态码。状态码指示 HTTP 请求是否成功、失败或需要进一步操作。

示例

基本状态码检查

-- Make a request and check the status code
local response = Request("https://api.example.com/users"):get()
local statusCode = response:getResponseCode()

if statusCode == 200 then
    print("Request successful!")
    local data = response:getData()
    print("Response data: " .. data)
else
    print("Request failed with status: " .. statusCode)
end

全面的状态码处理

local response = Request("https://api.example.com/data"):get()
local status = response:getResponseCode()

if status >= 200 and status < 300 then
    -- Success responses (2xx)
    print("Request successful (2xx)")
    local data = response:getData()
    print("Data: " .. data)

elseif status >= 300 and status < 400 then
    -- Redirection responses (3xx)
    print("Redirection received (3xx)")
    print("Status: " .. status)

elseif status >= 400 and status < 500 then
    -- Client error responses (4xx)
    print("Client error (4xx)")
    local errorData = response:getData()
    if errorData and errorData ~= "" then
        print("Error details: " .. errorData)
    end

elseif status >= 500 and status < 600 then
    -- Server error responses (5xx)
    print("Server error (5xx)")
    local errorData = response:getData()
    if errorData and errorData ~= "" then
        print("Server error details: " .. errorData)
    end

else
    print("Unexpected status code: " .. status)
end

特定状态码处理

local response = Request("https://api.example.com/users/123"):get()
local status = response:getResponseCode()

if status == 200 then
    print("OK - Request successful")
    local userData = response:getData()
    print("User data: " .. userData)

elseif status == 201 then
    print("Created - Resource created successfully")
    local newResource = response:getData()
    print("New resource: " .. newResource)

elseif status == 204 then
    print("No Content - Request successful, no response body")

elseif status == 400 then
    print("Bad Request - Invalid request data")
    local errorInfo = response:getData()
    print("Error: " .. errorInfo)

elseif status == 401 then
    print("Unauthorized - Authentication required")

elseif status == 403 then
    print("Forbidden - Access denied")

elseif status == 404 then
    print("Not Found - Resource does not exist")

elseif status == 500 then
    print("Internal Server Error")
    local serverError = response:getData()
    print("Server error details: " .. serverError)

else
    print("Other status: " .. status)
    local otherData = response:getData()
    if otherData and otherData ~= "" then
        print("Response: " .. otherData)
    end
end

特定于 HTTP 方法的状态码

-- GET request
local getResponse = Request("https://api.example.com/data"):get()
local getStatus = getResponse:getResponseCode()

if getStatus == 200 then
    print("Data retrieved successfully")
elseif getStatus == 404 then
    print("Data not found")
end

-- POST request
local postResponse = Request("https://api.example.com/users")
    :setParameter("name", "John")
    :setParameter("email", "john@example.com")
    :post()

local postStatus = postResponse:getResponseCode()

if postStatus == 201 then
    print("User created successfully")
    local newUser = postResponse:getData()
    print("Created user: " .. newUser)
elseif postStatus == 400 then
    print("Invalid user data")
elseif postStatus == 409 then
    print("User already exists")
end

-- DELETE request
local deleteResponse = Request("https://api.example.com/users/123"):delete()
local deleteStatus = deleteResponse:getResponseCode()

if deleteStatus == 204 then
    print("User deleted successfully")
elseif deleteStatus == 404 then
    print("User not found")
end

状态码辅助函数

function handleResponse(response)
    local status = response:getResponseCode()
    local data = response:getData()

    -- Success (2xx)
    if status >= 200 and status < 300 then
        print("✓ Request successful (" .. status .. ")")
        if data and data ~= "" then
            return data
        else
            return "Success (no content)"
        end
    end

    -- Client errors (4xx)
    if status >= 400 and status < 500 then
        print("✗ Client error (" .. status .. ")")
        if data and data ~= "" then
            print("Error details: " .. data)
        end
        return nil
    end

    -- Server errors (5xx)
    if status >= 500 and status < 600 then
        print("✗ Server error (" .. status .. ")")
        if data and data ~= "" then
            print("Server error: " .. data)
        end
        return nil
    end

    print("? Unexpected status: " .. status)
    return nil
end

-- Usage
local response = Request("https://api.example.com/data"):get()
local result = handleResponse(response)

if result then
    print("Operation successful: " .. result)
else
    print("Operation failed")
end

API 重试逻辑

function makeRequestWithRetry(url, maxRetries)
    local retries = 0

    while retries < maxRetries do
        local response = Request(url):get()
        local status = response:getResponseCode()

        -- Success
        if status == 200 then
            return response:getData()
        end

        -- Don't retry on client errors (4xx)
        if status >= 400 and status < 500 then
            print("Client error (" .. status .. "), not retrying")
            return nil
        end

        -- Retry on server errors (5xx)
        if status >= 500 and status < 600 then
            retries = retries + 1
            print("Server error (" .. status .. "), retrying... (" .. retries .. "/" .. maxRetries .. ")")
            -- Wait before retrying (you might want to add a delay here)
        else
            retries = retries + 1
            print("Unexpected status (" .. status .. "), retrying... (" .. retries .. "/" .. maxRetries .. ")")
        end
    end

    print("Max retries reached, giving up")
    return nil
end

local data = makeRequestWithRetry("https://api.example.com/unstable", 3)
if data then
    print("Request succeeded: " .. data)
end

常见 HTTP 状态码

代码	类别	含义	典型用法
200	成功	OK	请求成功
201	成功	Created	资源已创建
204	成功	No Content	成功，无响应主体
400	客户端错误	Bad Request	无效的请求数据
401	客户端错误	Unauthorized	需要身份验证
403	客户端错误	Forbidden	拒绝访问
404	客户端错误	Not Found	资源不存在
409	客户端错误	Conflict	资源冲突
500	服务器错误	Internal Server Error	服务器端错误
502	服务器错误	Bad Gateway	无效的上游响应
503	服务器错误	Service Unavailable	服务器暂时不可用

说明

• 在处理响应数据之前，请始终检查状态码
• 状态码在 HTTP/1.1 和 HTTP/2 中是标准化的
• 2xx 代码表示成功，3xx 表示重定向，4xx 表示客户端错误，5xx 表示服务器错误
• 某些 API 可能使用自定义状态码或非标准的含义
• 错误响应（4xx、5xx）的响应主体中可能包含有用的信息
• 网络错误或超时可能会完全阻止响应对象的创建