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// https://d3js.org/d3-request/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-collection'), require('d3-dispatch'), require('d3-dsv')) :
typeof define === 'function' && define.amd ? define(['exports', 'd3-collection', 'd3-dispatch', 'd3-dsv'], factory) :
(factory((global.d3 = global.d3 || {}),global.d3,global.d3,global.d3));
}(this, function (exports,d3Collection,d3Dispatch,d3Dsv) { 'use strict';
function request(url, callback) {
var request,
event = d3Dispatch.dispatch("beforesend", "progress", "load", "error"),
mimeType,
headers = d3Collection.map(),
xhr = new XMLHttpRequest,
user = null,
password = null,
response,
responseType,
timeout = 0;
// If IE does not support CORS, use XDomainRequest.
if (typeof XDomainRequest !== "undefined"
&& !("withCredentials" in xhr)
&& /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;
"onload" in xhr
? xhr.onload = xhr.onerror = xhr.ontimeout = respond
: xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };
function respond(o) {
var status = xhr.status, result;
if (!status && hasResponse(xhr)
|| status >= 200 && status < 300
|| status === 304) {
if (response) {
try {
result = response.call(request, xhr);
} catch (e) {
event.call("error", request, e);
return;
}
} else {
result = xhr;
}
event.call("load", request, result);
} else {
event.call("error", request, o);
}
}
xhr.onprogress = function(e) {
event.call("progress", request, e);
};
request = {
header: function(name, value) {
name = (name + "").toLowerCase();
if (arguments.length < 2) return headers.get(name);
if (value == null) headers.remove(name);
else headers.set(name, value + "");
return request;
},
// If mimeType is non-null and no Accept header is set, a default is used.
mimeType: function(value) {
if (!arguments.length) return mimeType;
mimeType = value == null ? null : value + "";
return request;
},
// Specifies what type the response value should take;
// for instance, arraybuffer, blob, document, or text.
responseType: function(value) {
if (!arguments.length) return responseType;
responseType = value;
return request;
},
timeout: function(value) {
if (!arguments.length) return timeout;
timeout = +value;
return request;
},
user: function(value) {
return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
},
password: function(value) {
return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
},
// Specify how to convert the response content to a specific type;
// changes the callback value on "load" events.
response: function(value) {
response = value;
return request;
},
// Alias for send("GET", …).
get: function(data, callback) {
return request.send("GET", data, callback);
},
// Alias for send("POST", …).
post: function(data, callback) {
return request.send("POST", data, callback);
},
// If callback is non-null, it will be used for error and load events.
send: function(method, data, callback) {
xhr.open(method, url, true, user, password);
if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
if (responseType != null) xhr.responseType = responseType;
if (timeout > 0) xhr.timeout = timeout;
if (callback == null && typeof data === "function") callback = data, data = null;
if (callback != null && callback.length === 1) callback = fixCallback(callback);
if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
event.call("beforesend", request, xhr);
xhr.send(data == null ? null : data);
return request;
},
abort: function() {
xhr.abort();
return request;
},
on: function() {
var value = event.on.apply(event, arguments);
return value === event ? request : value;
}
};
if (callback != null) {
if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
return request.get(callback);
}
return request;
}
function fixCallback(callback) {
return function(error, xhr) {
callback(error == null ? xhr : null);
};
}
function hasResponse(xhr) {
var type = xhr.responseType;
return type && type !== "text"
? xhr.response // null on error
: xhr.responseText; // "" on error
}
function type(defaultMimeType, response) {
return function(url, callback) {
var r = request(url).mimeType(defaultMimeType).response(response);
if (callback != null) {
if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
return r.get(callback);
}
return r;
};
}
var html = type("text/html", function(xhr) {
return document.createRange().createContextualFragment(xhr.responseText);
});
var json = type("application/json", function(xhr) {
return JSON.parse(xhr.responseText);
});
var text = type("text/plain", function(xhr) {
return xhr.responseText;
});
var xml = type("application/xml", function(xhr) {
var xml = xhr.responseXML;
if (!xml) throw new Error("parse error");
return xml;
});
function dsv(defaultMimeType, parse) {
return function(url, row, callback) {
if (arguments.length < 3) callback = row, row = null;
var r = request(url).mimeType(defaultMimeType);
r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
r.row(row);
return callback ? r.get(callback) : r;
};
}
function responseOf(parse, row) {
return function(request) {
return parse(request.responseText, row);
};
}
var csv = dsv("text/csv", d3Dsv.csvParse);
var tsv = dsv("text/tab-separated-values", d3Dsv.tsvParse);
exports.request = request;
exports.html = html;
exports.json = json;
exports.text = text;
exports.xml = xml;
exports.csv = csv;
exports.tsv = tsv;
Object.defineProperty(exports, '__esModule', { value: true });
}));