%[text] # HTTP calls with MATLAB
%[text:tableOfContents]{"heading":"**Table of Contents**"}
%[text] 
%%
%[text] ### 1. The Basics: A Simple GET Request
% Coinbase API endpoint for spot BTC price in USD
data = webread("https://api.coinbase.com/v2/prices/BTC-USD/spot") %[output:49bc4e68]
% Extract the price
btcPrice = str2double(data.data.amount) %[output:6996c251]
%%
%[text] ### 2. Sending Parameters in a Request 
% Example: GET request with query parameters
url = "https://api.agify.io"; % Predicts age by first name
age = webread(url, name="Yann") %[output:2fb7a581]
%%
%[text] ### 3. Custom Headers (e.g. API Keys)
%[text] In order to access certain web services like OpenAI, you will be required to pass an API key along with your request.
loadenv(".env")
OPENAI_API_KEY = getenv("OPENAI_API_KEY");
%%
% Example with headers
url = "https://api.openai.com/v1/models";

% Create HTTP header with an API key
headers = matlab.net.http.HeaderField("Authorization", "Bearer " + OPENAI_API_KEY);

% Create request
request = matlab.net.http.RequestMessage(matlab.net.http.RequestMethod.GET, headers);

% Send request
response = send(request, url);

% Parse body
json = response.Body.Data %[output:9e4635a2]
json.data %[output:78b2f467]
%%
%[text] ### 4. POST Requests with JSON Body
% Example: POST request with JSON body
url = "https://jsonplaceholder.typicode.com/posts";
body = struct("title","foo","body","bar","userId",1);
options = weboptions("MediaType","application/json");
response = webwrite(url, body, options) %[output:0fbe6d90]
%%
%[text] ### 5. Using the Full `matlab.net.http` Workflow
import matlab.net.*
import matlab.net.http.*

url = "https://jsonplaceholder.typicode.com/posts";

% JSON body
bodyData = struct("title","MATLAB","body","Hello Web","userId",2);

% Build request
header = HeaderField("Content-Type","application/json");
req = RequestMessage(RequestMethod.POST, header, bodyData);

% Send
resp = req.send(url) %[output:6afcb61e]

resp.Body.Data %[output:4786e540]
%%
%[text] ### 6. Handling Errors
try %[output:group:7091fe91]
    webread("https://api.github.com/invalid-endpoint");
catch ME
    disp(ME.message) %[output:50d27447]
end %[output:group:7091fe91]
%%
%[text] ### 7. Practical Example: Download Weather Data (Open-Meteo API)
%[text] [🌦️ Docs | Open-Meteo.com](https://open-meteo.com/en/docs)
url = "https://api.open-meteo.com/v1/forecast";
data = webread(url, latitude=48.85, longitude=2.35,hourly="temperature_2m"); % Paris
% Convert time to datetime
timeData = datetime(data.hourly.time, InputFormat="yyyy-MM-dd'T'HH:mm", TimeZone='GMT');
plot(timeData, data.hourly.temperature_2m)
xlabel("Time")
ylabel("Temperature (°C)")
title("Hourly Temperature in Paris")
grid on
%%
%[text] ### 8. Practical Example: Get commits history from a GitHub repo
%[text] [REST API endpoints for repositories - GitHub Docs](https://docs.github.com/en/rest/repos/repos?apiVersion=2022-11-28#get-a-repository)
url = "https://api.github.com/repos/matlab-deep-learning/llms-with-matlab";
response = webread(url) %[output:33fbccc4]
%%
commits_url = strrep(response.commits_url, '{/sha}', '');
c = webread(commits_url) % Extract commits from the response %[output:4ca442f1]
%%
% pull out the nested commit structs as a flat 1×N struct array
commits = [c.commit] % -> struct array with fields: author, message, ... %[output:51d2c43f]
%%
a = [commits.author] %[output:0ced3a1e]
%%
% ISO 8601 → datetime (UTC)
commitDate = datetime(string({a.date}).', ... %[output:group:95547510] %[output:65b2032a]
    'InputFormat','yyyy-MM-dd''T''HH:mm:ss''Z', 'TimeZone','UTC') %[output:group:95547510] %[output:65b2032a]
%%
% Count per calendar day
[counts,days] = groupcounts(dateshift(commitDate,'start','day'));  % returns sorted days
bar(days, counts)
title('Commits per day')
xlabel('Day')
ylabel('Number of commits')
xtickangle(45)

%[appendix]{"version":"1.0"}
%---
%[metadata:view]
%   data: {"layout":"inline"}
%---
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%---
%[output:6996c251]
%   data: {"dataType":"textualVariable","outputData":{"name":"btcPrice","value":"1.1208e+05"}}
%---
%[output:2fb7a581]
%   data: {"dataType":"textualVariable","outputData":{"header":"struct with fields:","name":"age","value":"    count: 27549\n     name: 'Yann'\n      age: 51\n"}}
%---
%[output:9e4635a2]
%   data: {"dataType":"textualVariable","outputData":{"header":"struct with fields:","name":"json","value":"    object: 'list'\n      data: [88×1 struct]\n"}}
%---
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%---
%[output:0fbe6d90]
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%---
%[output:6afcb61e]
%   data: {"dataType":"textualVariable","outputData":{"name":"resp","value":"  <a href=\"matlab:helpPopup('matlab.net.http.ResponseMessage')\" style=\"font-weight:bold\">ResponseMessage<\/a> with properties:\n\n    StatusLine: 'HTTP\/1.1 201 Created'\n    StatusCode: Created\n        Header: [1×27 matlab.net.http.HeaderField]\n          Body: [1×1 matlab.net.http.MessageBody]\n     Completed: 0\n"}}
%---
%[output:4786e540]
%   data: {"dataType":"textualVariable","outputData":{"header":"struct with fields:","name":"ans","value":"     title: 'MATLAB'\n      body: 'Hello Web'\n    userId: 2\n        id: 101\n"}}
%---
%[output:50d27447]
%   data: {"dataType":"text","outputData":{"text":"The server returned the status 404 with message \"Not Found\" in response to the request to URL https:\/\/api.github.com\/invalid-endpoint.\n","truncated":false}}
%---
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