我尝试使用 Heroku 作为 flickr api 的一层，因为 GFW 已经屏蔽了 flickr，也许将来还会屏蔽其他公共(public) api。我可以在本地环境或AWS上运行index.js，但无法在Heroku上运行。我做了一些研究，看起来 Heroku 只支持 HTTP 服务器，因为它在 dyno 之外有一个层。所以我编写了如下代码:
var http = require('http');
var qs = require('querystring');
var curl = require('request');
var Port = 80;
var httpServer = http.createServer(app).listen(Port);
function app(request, response) {
if(request.method === "GET") {
response.writeHead(401, {'Content-Type': 'text/html'});
response.write('<!doctype html><html><head><title>401</title></head><body>401: Unauthorized</body></html>');
response.end();
} else if(request.method === "POST") {
if (request.url === "/") {
var requestBody = '';
request.on('data', function(data) {
requestBody += data;
if(requestBody.length > 1e7) {
response.writeHead(413, 'Request Entity Too Large', {'Content-Type': 'text/html'});
response.end('413: Request Entity Too Large');
}
});
request.on('end', function() {
var formData = qs.parse(requestBody);
if (formData.request === 'list') {
var url = 'https://api.flickr.com/services/rest/?method=flickr.photosets.getList&api_key={{insert_api_key}}&user_id={{insert_user_id}}&format=json';
} else if (formData.request === 'photoset') {
var url = 'https://api.flickr.com/services/rest/?method=flickr.photosets.getPhotos&photoset_id=' + formData.id + '&api_key={{insert_api_key}}&user_id={{insert_user_id}}&extras=url_o&format=json';
} else {
response.writeHead(400, 'Bad Request', {'Content-Type': 'text/html'});
response.end('400: Bad Request');
return;
}
getrequest(url, (err, body)=>{
if (err) {
response.writeHead(502, 'Bad Gateway', {'Content-Type': 'text/html'});
response.end('502: Bad Gateway');
} else {
response.writeHead(200, {'Content-Type': 'text/html'});
response.write(body);
response.end();
}
});
});
} else {
response.writeHead(404, 'Resource Not Found', {'Content-Type': 'text/html'});
response.end('<!doctype html><html><head><title>404</title></head><body>404: Resource Not Found</body></html>');
}
} else {
response.writeHead(405, 'Method Not Supported', {'Content-Type': 'text/html'});
return response.end('<!doctype html><html><head><title>405</title></head><body>405: Method Not Supported</body></html>');
}
};
function getrequest(url, callback){
curl(url, (error, response, body) => {
if (error) {
callback(error);
return;
}
callback(null, body);
});
}
自动构建已完成，但当我向 dyno 的 url 发送 POST 请求时，出现 506 错误。当我运行 heroku run node index.js 时，它会抛出以下错误消息:
events.js:160
throw er; // Unhandled 'error' event
^
Error: listen EACCES 0.0.0.0:80
at Object.exports._errnoException (util.js:1018:11)
at exports._exceptionWithHostPort (util.js:1041:20)
at Server._listen2 (net.js:1245:19)
at listen (net.js:1294:10)
at Server.listen (net.js:1390:5)
at Object.<anonymous> (/app/index.js:5:41)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
最佳答案
.listen(process.env.PORT || 端口)
Heroku 需要一个您未设置的动态端口。
关于node.js - 如何使用 Heroku 作为 API 代理(Node.js)？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44373259/