How to add data to request body while proxying it - javascript

I have a call made from my client that passes in some post data like this:
function doSomethingApi(email) {
return axios({
method: 'post',
url: `/api`,
data: {
scan_refference: 'ref',
user_email: email
}
})
}
On the server side this gets proxied to apply certain secrets:
app.post('/api', (req, res) => {
const url = 'https://my.api.com';
req.pipe(request({
url,
headers: {
'Content-Type': 'application/json',
Accept: 'application/json'
},
auth: {
user: secrets.USERNAME,
pass: secrets.PASSWORD
},
body: {
value1: `${secrets.VALUE1}`,
value2: `${secrets.VALUE2}`
}
})).pipe(res);
});
request and axios are just 2 different http libraries I use, one is preferred for client other for server, thats all. Issue now is that I am overwriting body in my proxy, where as I want to simply add value1 and value2 to existing body passed from client.

First get the body from the initial call as a JSON object. This depends on what you use, but e.g. in Express you could:
app.use(express.bodyParser());
Then
var previousBody = req.body
Finally merge the initial JSON with whatever you want (NOTE: this means your client will definitely not be able to use the "value1" and "value2" properties, because they will be overwritten)
body: Object.assign(previousBody, {
value1: `${secrets.VALUE1}`,
value2: `${secrets.VALUE2}`
})

Related

Request in javascript (from python)

I have attempted to create a request in javascript, that has previously worked using python just fine.
the following is an accurate representation of the code I used to post the request with python:
url = 'https://website.com/api/e1'
header = {
'authorization': 'abcd1234'
}
payload = {
'content': "text",
}
r = requests.post(url, data=payload,headers=header )
This (above) works just fine in python.
now what I did in javascript is the following:
payload = {
"content": "this is text",
};
fetch("https://website.com/api/e1", {
method: "POST",
headers: {
"authorization":
"abcd1234",
},
body: JSON.stringify(payload),
});
but this is returning the error
400- Bad request
When using data parameters on python requests.post, the default Content-Type is application/x-www-form-urlencoded(I couldn't find it on the document, but I checked the request. If you know, please leave a comment).
To achieve the same result with fetch, you must do as follows.
const payload = {
'content': 'this is text',
};
fetch('https://website.com/api/e1', {
method: 'POST',
headers: {
'authorization': 'abcd1234',
},
body: new URLSearchParams(payload),
});
You don't need to do this body: JSON.stringify(payload), rather you can simply pass payload in body like this body:payload

Getting variable from array then pass to url on nodejs request module

I have this array and need to pass all the variables inside the request url.
I've tried as result.variable1, result['variable1'], result[0], but nothing works.
How can access each variable inside the array and pass to url?
result.push({variable1: string1, variable2: string2});
request.post({
url: "mydomain.com/text="Hi"+result[variable1]+"\\n"+result[variable2]+"Hello!",
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Accept': 'application/json'
},
rejectUnauthorized: false,//add when working with https sites
requestCert: false,//add when working with https sites
agent: false,//add when working with https sites
form: {
myfield: "myfieldvalue"
}
}, function (response, err, body){
console.log('Body:',JSON.parse(body));
}.bind(this));
result.push({variable1: string1, variable2: string2});
This will result in the array becoming as
result = [{variable1: string1, variable2: string2}].
So if you want 'variable1', you need to access it as result[0].variable1.

Send nested json data with get method using axios

I am trying to send a nested json data with get method using axios, but the problem is that the backend considers the children as a string.
const TOKEN = "token"
const config = {
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
'Authorization': TOKEN,
},
data: {},
params: {
"page_id": 1,
"filter": {
"search": "name"
}
}
};
axios.get("http://localhost/api/pages", config)
What I get if I want to print filter in backend:
"{"search": "name"}"
You may have two options:
1- The first option is to decode the string you receive to json.
e.g.
---json_decode() in php
--- JSONObject() in java
--- JSON.parse() in nodejs
or any other method depending on your backend language...
2- The second option is to send your object in this format:
params: {
"page_id": 1,
"filter[search]": "name"
}
And pay attention not to put search in quotes!
You can use req.query on the server side:
function get(req, res, next) {
const { filter } = req.query;
console.log(filter);
...
}
Do a JSON.parse() of your Request.query.filter. Note that Request should be the request variable in your backend.

Express.js http call inside route doesn't update variable

I'm building a REST api on top of express.js. I am having trouble updating variables inside my routes.
Example:
I'm calling app.get("/wp/page/create/:id", function(req, res)
Inside this route I start by calling a http request using request-promise library. The response of this call I use in a nested http call.
I use a global variable for the headers for the nested call, and it's to the header a i need to make changes by using the etag variable.
Code:
global.postHeaders = headers;
postHeaders['X-HTTP-Method'] = "MERGE";
postHeaders['Content-Type'] = 'application/json;odata=verbose';
postHeaders['X-RequestDigest'] = spContext;
request.get({
url: "xxx",
headers: headers,
json: true
}).then(function(response) {
var etag = response.d.__metadata.etag
postHeaders['If-Match'] = etag;
request.post({
url: "xxx",
type: "POST",
body: data,
headers: postHeaders,
json: true
}).then(function(data) {
res.send(data).end()
console.log("All done!");
})
})
When i start the server up and enter the route everything works fine. When i when try to hit it again the etag variables is still the same, even though it should be updated.
If I restart the server it works the again on the first attempt but fails on the second/third.
Any idea what I am doing wrong?
I have resolved the issues. The simple solution was to clear the headers containing the variable.
global.postHeaders = headers;
postHeaders['X-HTTP-Method'] = "MERGE";
postHeaders['Content-Type'] = 'application/json;odata=verbose';
postHeaders['X-RequestDigest'] = spContext;
request.get({
url: "xxx",
headers: headers,
json: true
}).then(function(response) {
var etag = response.d.__metadata.etag
postHeaders['If-Match'] = etag;
request.post({
url: "xxx",
type: "POST",
body: data,
headers: postHeaders,
json: true
}).then(function(data) {
postHeaders['If-Match'] = "";
res.send(data).end()
console.log("All done!");
})
})
postHeaders is a global variable. is headers in global.postHeaders = headers; also a global varaible ? Whatever you are trying to do here is grossly wrong. postHeaders variable will be shared across multiple request. so you will hit a scenario where postHeaders['If-Match'] value might be empty string or the etag .
Try this instead of the first line
var postHeaders = Object.assign({}, headers);
Not sure what you are trying, but at-least this statement will subside the huge error in the code. This will create a new header object for each request.

HTTPS request not posting body of REST request

I'm trying to POST to an API endpoint on my server. I know my endpoint works because if I use Advanced REST Client, I can hit it and get a JSON response as expected. The problem seems to be that no data is being sent in the body of my request despite calling request.write(postData) which contains a key, value pair. Without this data being sent in the body, my server returns a 401 error as expected without this information. Printing out the content of the POST server-side is empty but I'm clueless as to why it's empty.
var postData = querystring.stringify({
"access_token" : accessToken,
"id": applianceId
});
var serverError = function (e) {
log("Error", e.message);
context.fail(generateControlError(requestName, "DEPENDENT_SERVICE_UNAVAILABLE", "Unable to connect to server"));
};
var callback = function(response) {
var str = "";
response.on("data", function(chunk) {
str += chunk.toString("utf-8");
});
response.on("end", function() {
result = generateResult(CONTROL, requestName.replace("Request", "Confirmation"), messageId);
context.succeed(result);
});
response.on("error", serverError);
};
var options = {
hostname: REMOTE_CLOUD_HOSTNAME,
port: 443,
path: REMOTE_CLOUD_BASE_PATH + "/" + endpoint,
method: "POST",
headers: {
"Content-Type": "application/x-www-form-urlencoded"
}
};
var request = https.request(options, callback);
request.on("error", serverError);
//This doesn't seem to write anything since if I print out the POST
//data server-side it's empty; however, if I print out the value of
//postData here, it looks as expected: 'access_token=xxxxx'
request.write(postData);
request.end();
I have testing you code again httpbin.org/post and it seems that it is working.
I believe that the issue related to, that your should POST application/json and not "application/x-www-form-urlencoded
Please try to change the header
headers: {
"Content-Type": "application/json"
}
Then, try to change the postData to JSON string:
var postData=JSON.stringify({access_token:"xxxxx"})
To be sure that problem you success to send and the problem is not local (maybe there is an issue in your server), change the target to mirror URL:
var options = {
hostname: "httpbin.org",
path:'/post',
port: 443,
method: "POST",
headers: {
"Content-Type": "application/json"
}
};
If there is no problem in your NodeJS version, the is the response you should get: (It is mean that the server got the posted data)
{
"args": {},
"data": "{\"access_token\":\"xxxxx\"}",
"files": {},
"form": {},
"headers": {
"Content-Length": "24",
"Content-Type": "application/json",
"Host": "httpbin.org"
},
"json": {
"access_token": "xxxxx"
},
"origin": "5.29.63.30",
"url": "https://httpbin.org/post"
}
BTW: I really recommend you to move to a library to manage the request for you:
https://github.com/request/request - Very popular
https://github.com/request/request-promise - For popular who like to use the Promise syntax (The next thing in JavaScript)
https://github.com/visionmedia/superagent - For people who like to write same code in Browser & Server

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