How to oAuth weather yahoo api - delphi

Question

I use this code to access weather data from yahoo and everything just work fine.
Somehow this stops working getting a "Bad request" from yahoo...
"Please provide valid credentials. OAuth oauth_problem="OST_OAUTH_PARAMETER_ABSENT_ERROR", realm="yahooapis.com"
"
I try to understood what happed and i think that has to do with the oAuth from yahoo but i don't know how to use it and the documentation from yahoo sucks...
code below..
mForcastTown.Add(MainForm.ExtraFE_IdHttp.Get('http://weather.yahooapis.com/forecastrss?w='+ mAdd_Town[mTonwNum].mWoeID +'&u='+ mAdd_Town[mTonwNum].mDegree);
Thank you...
UPDATE...
I found this below and when run in the browser i get the xml i need but when i run it to the
IdHttp.get('http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20weather.forecast%20where%20woeid=55903793%20and%20u=%27c%27&format=xml')
i get unknown version found...
What is this...
Thank you...

Answer 1

I had the same problem for Java, maybe this will direct you to something.
In this link there is a sample java code:
// Copyright 2019 Oath Inc. Licensed under the terms of the zLib license see https://opensource.org/licenses/Zlib for terms.
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.util.List;
import java.util.ArrayList;
import java.util.Date;
import java.util.Base64;
import java.util.Base64.Encoder;
import java.util.Random;
import java.util.Collections;
import java.net.URLEncoder;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.URI;
/**
*
* <pre>
* % java --version
* % java 11.0.1 2018-10-16 LTS
*
* % javac WeatherYdnJava.java && java -ea WeatherYdnJava
* </pre>
*
*/
public class WeatherYdnJava {
public static void main(String[] args) throws Exception {
final String appId = "test-app-id";
final String consumerKey = "your-consumer-key";
final String consumerSecret = "your-consumer-secret";
final String url = "https://weather-ydn-yql.media.yahoo.com/forecastrss";
long timestamp = new Date().getTime() / 1000;
byte[] nonce = new byte[32];
Random rand = new Random();
rand.nextBytes(nonce);
String oauthNonce = new String(nonce).replaceAll("\\W", "");
List<String> parameters = new ArrayList<>();
parameters.add("oauth_consumer_key=" + consumerKey);
parameters.add("oauth_nonce=" + oauthNonce);
parameters.add("oauth_signature_method=HMAC-SHA1");
parameters.add("oauth_timestamp=" + timestamp);
parameters.add("oauth_version=1.0");
// Make sure value is encoded
parameters.add("location=" + URLEncoder.encode("sunnyvale,ca", "UTF-8"));
parameters.add("format=json");
Collections.sort(parameters);
StringBuffer parametersList = new StringBuffer();
for (int i = 0; i < parameters.size(); i++) {
parametersList.append(((i > 0) ? "&" : "") + parameters.get(i));
}
String signatureString = "GET&" +
URLEncoder.encode(url, "UTF-8") + "&" +
URLEncoder.encode(parametersList.toString(), "UTF-8");
String signature = null;
try {
SecretKeySpec signingKey = new SecretKeySpec((consumerSecret + "&").getBytes(), "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(signingKey);
byte[] rawHMAC = mac.doFinal(signatureString.getBytes());
Encoder encoder = Base64.getEncoder();
signature = encoder.encodeToString(rawHMAC);
} catch (Exception e) {
System.err.println("Unable to append signature");
System.exit(0);
}
String authorizationLine = "OAuth " +
"oauth_consumer_key=\"" + consumerKey + "\", " +
"oauth_nonce=\"" + oauthNonce + "\", " +
"oauth_timestamp=\"" + timestamp + "\", " +
"oauth_signature_method=\"HMAC-SHA1\", " +
"oauth_signature=\"" + signature + "\", " +
"oauth_version=\"1.0\"";
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(url + "?location=sunnyvale,ca&format=json"))
.header("Authorization", authorizationLine)
.header("X-Yahoo-App-Id", appId)
.header("Content-Type", "application/json")
.build();
HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
System.out.println(response.body());
}
}
The problem with this code is where the oauthNonce generated with random bytes. Here, the error is caused by the unrecognized chars. Because for any random byte there can be any char that your system doesn't recognize and can't process because it converts it into a string.
I replace the whole part with this:
String oauthNonce = RandomStringUtils.random(10, true, true);
It worked like a charm. I currently don't have any errors now and able to get the response. I hope this helps.