使用 http 模块下载 https 的链接会报异常
这时候需要使用 https 模块下载，下面是兼容 http 和 https 的下载函数：
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const fs = require("fs");
const path = require("path");
const http = require("http");
const https = require("https");
async function download(url, filePath) {
const proto = url.startsWith("https") ? https : http;
return new Promise((resolve, reject) => {
const file = fs.createWriteStream(filePath);
let fileInfo = null;
// const request = proto.get(url, response => {
const request = proto.get(url, (response) => {
if (response.statusCode !== 200) {
fs.unlink(filePath, () => {
reject(new Error(`Failed to get '${url}' (${response.statusCode})`));
});
return;
}
fileInfo = {
mime: response.headers["content-type"],
size: parseInt(response.headers["content-length"], 10),
};
response.pipe(file);
});
// The destination stream is ended by the time it's called
file.on("finish", () => resolve(fileInfo));
request.on("error", (err) => {
fs.unlink(filePath, () => reject(err));
});
file.on("error", (err) => {
fs.unlink(filePath, () => reject(err));
});
request.end();
});
}
const url = "https://100.100.22.140/files/1.0.zip";
download(url, path.resolve("./download"));
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目标下载地址是自签的 https 证书，下载会报异常
但是如果目标下载地址是自签的 https 证书，则下载也会失败，这时候有两种解决方式：
第一种：环境变量设置 NODE_TLS_REJECT_UNAUTHORIZED
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process.env["NODE_TLS_REJECT_UNAUTHORIZED"] = 0;
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第二种：https 模块下载时加上 { rejectUnauthorized: false } 可选项
具体的例子如下：
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const fs = require("fs");
const path = require("path");
const http = require("http");
const https = require("https");
// process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = 0;
async function download(url, filePath) {
const proto = url.startsWith("https") ? https : http;
return new Promise((resolve, reject) => {
const file = fs.createWriteStream(filePath);
let fileInfo = null;
// const request = proto.get(url, response => {
const request = proto.get(
url,
{ rejectUnauthorized: false },
(response) => {
if (response.statusCode !== 200) {
fs.unlink(filePath, () => {
reject(
new Error(`Failed to get '${url}' (${response.statusCode})`)
);
});
return;
}
fileInfo = {
mime: response.headers["content-type"],
size: parseInt(response.headers["content-length"], 10),
};
response.pipe(file);
}
);
// The destination stream is ended by the time it's called
file.on("finish", () => resolve(fileInfo));
request.on("error", (err) => {
fs.unlink(filePath, () => reject(err));
});
file.on("error", (err) => {
fs.unlink(filePath, () => reject(err));
});
request.end();
});
}
const url = "https://100.100.22.140/files/1.0.zip";
download(url, path.resolve("./download"));
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参考链接