替换所有出现的字符串http://example.com为https://secure.example.com。

替换文本中的特定字符串通常可以在编程语言中通过正则表达式或者字符串处理函数来完成。如果你有一个字符串变量`str`，你可以这样做：

例如，在Python中，可以使用`re.sub()`函数：

import re
original_str = "http://example.com 这是一个链接"
new_str = re.sub(r'http://example\.com', 'https://secure.example.com', original_str)

在这个例子中，`r'http://example\.com'`是正则表达式模式，`\.`是为了匹配`.`字符，因为`.`在正则表达式中有特殊含义。

在JavaScript中，也可以使用类似的方法：

let originalStr = "http://example.com is a link";
let newStr = originalStr.replace(/http:\/\/example\.com/g, "https://secure.example.com");

这里`/http:\/\/example\.com/g`是一个正则表达式，`g`标志表示全局搜索替换。

相关问题

写个WinHttp 访问https://www.amazon.com.au/ap/signin 并返回响应内容

下面是使用 WinHttp 访问 https://www.amazon.com.au/ap/signin 并返回响应内容的示例代码：

#include <windows.h>
#include <winhttp.h>
#include <iostream>
#include <string>

#pragma comment(lib, "winhttp.lib")

int main()
{
    HINTERNET hSession = NULL, hConnect = NULL, hRequest = NULL;

    // 初始化 WinHttp
    hSession = WinHttpOpen(L"WinHTTP Example/1.0", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
    if (!hSession)
    {
        std::cout << "Failed to open WinHttp session." << std::endl;
        return 1;
    }

    // 建立连接
    hConnect = WinHttpConnect(hSession, L"www.amazon.com.au", INTERNET_DEFAULT_HTTPS_PORT, 0);
    if (!hConnect)
    {
        std::cout << "Failed to connect to server." << std::endl;
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 创建请求
    hRequest = WinHttpOpenRequest(hConnect, L"GET", L"/ap/signin", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE);
    if (!hRequest)
    {
        std::cout << "Failed to create request." << std::endl;
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 发送请求
    if (!WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0))
    {
        std::cout << "Failed to send request." << std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 等待响应
    if (!WinHttpReceiveResponse(hRequest, NULL))
    {
        std::cout << "Failed to receive response." << std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return 1;
    }

    // 读取响应内容
    std::string response;
    DWORD dwSize = 0, dwDownloaded = 0;
    LPSTR pszOutBuffer = NULL;

    do
    {
        // 确定缓冲区大小
        dwSize += 4096;
        pszOutBuffer = (LPSTR)realloc(pszOutBuffer, dwSize);
        if (!pszOutBuffer)
        {
            std::cout << "Out of memory." << std::endl;
            WinHttpCloseHandle(hRequest);
            WinHttpCloseHandle(hConnect);
            WinHttpCloseHandle(hSession);
            return 1;
        }

        // 读取响应内容
        ZeroMemory(pszOutBuffer + dwDownloaded, 4096);
        if (!WinHttpReadData(hRequest, pszOutBuffer + dwDownloaded, 4096, &dwDownloaded))
        {
            std::cout << "Failed to read data." << std::endl;
            WinHttpCloseHandle(hRequest);
            WinHttpCloseHandle(hConnect);
            WinHttpCloseHandle(hSession);
            return 1;
        }

        // 将读取到的内容添加到字符串中
        response.append(pszOutBuffer + dwDownloaded, dwDownloaded);
    } while (dwDownloaded > 0);

    // 输出响应内容
    std::cout << response << std::endl;

    // 释放资源
    free(pszOutBuffer);
    WinHttpCloseHandle(hRequest);
    WinHttpCloseHandle(hConnect);
    WinHttpCloseHandle(hSession);

    return 0;
}

这段代码与前面的代码类似，不同之处在于它将响应内容保存到一个 std::string 类型的变量中，并在读取响应内容时将每次读取到的内容添加到字符串中。最后输出字符串即可。

用WinHttp 写个访问https://www.amazon.com.au/ap/signin的函数 并且返回响应内容和Headers

好的，以下是用WinHttp访问https://www.amazon.com.au/ap/signin并返回响应内容和Headers的函数：

#include <Windows.h>
#include <Winhttp.h>
#include <iostream>
#include <vector>

#pragma comment(lib, "winhttp.lib")

std::vector<std::string> split(const std::string& str, const std::string& delim) {
    std::vector<std::string> res;
    if (str.empty()) {
        return res;
    }

    std::string::size_type start = 0;
    std::string::size_type index = str.find(delim, start);
    while (index != std::string::npos) {
        res.push_back(str.substr(start, index - start));
        start = index + delim.length();
        index = str.find(delim, start);
    }

    res.push_back(str.substr(start));
    return res;
}

std::string UrlEncode(const std::string& str) {
    std::string res;

    for (size_t i = 0; i < str.length(); ++i) {
        char c = str[i];
        if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') ||
            (c >= 'a' && c <= 'z') || c == '-' || c == '_' || c == '.' || c == '~') {
            res.push_back(c);
        } else if (c == ' ') {
            res.push_back('+');
        } else {
            res.push_back('%');
            res.push_back("0123456789ABCDEF"[((unsigned char)c) >> 4]);
            res.push_back("0123456789ABCDEF"[((unsigned char)c) & 15]);
        }
    }

    return res;
}

std::string AmazonSignIn() {
    // 创建会话句柄
    HINTERNET hSession = WinHttpOpen(L"WinHTTP Example/1.0", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
    if (!hSession) {
        std::cout << "WinHttpOpen failed: " << GetLastError() << std::endl;
        return "";
    }

    // 创建连接句柄
    HINTERNET hConnect = WinHttpConnect(hSession, L"www.amazon.com.au", INTERNET_DEFAULT_HTTPS_PORT, 0);
    if (!hConnect) {
        std::cout << "WinHttpConnect failed: " << GetLastError() << std::endl;
        WinHttpCloseHandle(hSession);
        return "";
    }

    // 创建请求句柄
    HINTERNET hRequest = WinHttpOpenRequest(hConnect, L"GET", L"/ap/signin", NULL, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, WINHTTP_FLAG_SECURE);
    if (!hRequest) {
        std::cout << "WinHttpOpenRequest failed: " << GetLastError() << std::endl;
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return "";
    }

    // 发送请求
    if (!WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0)) {
        std::cout << "WinHttpSendRequest failed: " << GetLastError() << std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return "";
    }

    // 等待响应
    if (!WinHttpReceiveResponse(hRequest, NULL)) {
        std::cout << "WinHttpReceiveResponse failed: " << GetLastError() << std::endl;
        WinHttpCloseHandle(hRequest);
        WinHttpCloseHandle(hConnect);
        WinHttpCloseHandle(hSession);
        return "";
    }

    // 获取响应头部信息
    DWORD dwSize = 0;
    WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_RAW_HEADERS_CRLF, WINHTTP_HEADER_NAME_BY_INDEX, NULL, &dwSize, WINHTTP_NO_HEADER_INDEX);
    if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
        std::vector<char> buffer(dwSize);
        if (!WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_RAW_HEADERS_CRLF, WINHTTP_HEADER_NAME_BY_INDEX, &buffer[0], &dwSize, WINHTTP_NO_HEADER_INDEX)) {
            std::cout << "WinHttpQueryHeaders failed: " << GetLastError() << std::endl;
            WinHttpCloseHandle(hRequest);
            WinHttpCloseHandle(hConnect);
            WinHttpCloseHandle(hSession);
            return "";
        }

        std::string headers(&buffer[0], dwSize);
        std::vector<std::string> lines = split(headers, "\r\n");
        for (const auto& line : lines) {
            std::cout << line << std::endl;
        }
    }

    // 获取响应内容
    std::string response;
    char buffer[1024];
    DWORD bytesRead = 0;
    while (WinHttpReadData(hRequest, buffer, sizeof(buffer), &bytesRead) && bytesRead != 0) {
        response.append(buffer, bytesRead);
    }

    // 关闭句柄
    WinHttpCloseHandle(hRequest);
    WinHttpCloseHandle(hConnect);
    WinHttpCloseHandle(hSession);

    return response;
}

int main() {
    std::string response = AmazonSignIn();
    std::cout << "Response: " << response << std::endl;
    return 0;
}

注意事项：

1. 要设置WINHTTP_FLAG_SECURE来指示使用HTTPS协议。
2. 要获取响应头部信息，可以先调用一次WinHttpQueryHeaders来获取需要的缓冲区大小，然后再分配缓冲区并调用一次WinHttpQueryHeaders来获取头部信息。
3. 要获取响应内容，可以使用WinHttpReadData来逐个读取数据块，并将它们附加到响应字符串中。
4. 这个函数只是一个简单的示例，实际使用时可能需要添加更多的错误处理和异常情况的处理。