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var superagent = require('superagent'),
WebApiError = require('./webapi-error');
var HttpManager = {};
/* Create superagent options from the base request */
var _getParametersFromRequest = function(request) {
var options = {};
if (request.getQueryParameters()) {
options.query = request.getQueryParameters();
}
if (
request.getHeaders() &&
request.getHeaders()['Content-Type'] === 'application/json'
) {
options.data = JSON.stringify(request.getBodyParameters());
} else if (request.getBodyParameters()) {
options.data = request.getBodyParameters();
}
if (request.getHeaders()) {
options.headers = request.getHeaders();
}
return options;
};
/* Create an error object from an error returned from the Web API */
var _getErrorObject = function(defaultMessage, err) {
var errorObject;
Eif (typeof err.error === 'object' && typeof err.error.message === 'string') {
// Web API Error format
errorObject = new WebApiError(err.error.message, err.error.status);
} else if (typeof err.error === 'string') {
// Authorization Error format
/* jshint ignore:start */
errorObject = new WebApiError(err.error + ': ' + err['error_description']);
/* jshint ignore:end */
} else if (typeof err === 'string') {
// Serialized JSON error
try {
var parsedError = JSON.parse(err);
errorObject = new WebApiError(
parsedError.error.message,
parsedError.error.status
);
} catch (err) {
// Error not JSON formatted
}
}
Iif (!errorObject) {
// Unexpected format
errorObject = new WebApiError(defaultMessage + ': ' + JSON.stringify(err));
}
return errorObject;
};
/* Make the request to the Web API */
HttpManager._makeRequest = function(method, options, uri, callback) {
var req = method.bind(superagent)(uri);
Iif (options.query) {
req.query(options.query);
}
Iif (
options.data &&
(!options.headers || options.headers['Content-Type'] !== 'application/json')
) {
req.type('form');
req.send(options.data);
} else Iif (options.data) {
req.send(options.data);
}
Iif (options.headers) {
req.set(options.headers);
}
req.end(function(err, response) {
if (err) {
var errorObject = _getErrorObject('Request error', {
error: err
});
return callback(errorObject);
}
return callback(null, {
body: response.body,
headers: response.headers,
statusCode: response.statusCode
});
});
};
/**
* Make a HTTP GET request.
* @param {BaseRequest} The request.
* @param {Function} The callback function.
*/
HttpManager.get = function(request, callback) {
var options = _getParametersFromRequest(request);
var method = superagent.get;
HttpManager._makeRequest(method, options, request.getURI(), callback);
};
/**
* Make a HTTP POST request.
* @param {BaseRequest} The request.
* @param {Function} The callback function.
*/
HttpManager.post = function(request, callback) {
var options = _getParametersFromRequest(request);
var method = superagent.post;
HttpManager._makeRequest(method, options, request.getURI(), callback);
};
/**
* Make a HTTP DELETE request.
* @param {BaseRequest} The request.
* @param {Function} The callback function.
*/
HttpManager.del = function(request, callback) {
var options = _getParametersFromRequest(request);
var method = superagent.del;
HttpManager._makeRequest(method, options, request.getURI(), callback);
};
/**
* Make a HTTP PUT request.
* @param {BaseRequest} The request.
* @param {Function} The callback function.
*/
HttpManager.put = function(request, callback) {
var options = _getParametersFromRequest(request);
var method = superagent.put;
HttpManager._makeRequest(method, options, request.getURI(), callback);
};
module.exports = HttpManager;
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