/**
* 转换当前地址为字符串。
*/
toString() {
let auth = this.auth || "";
if (auth) {
auth = encodeURIComponent(auth).replace(/%3A/g, ":");
auth += "@";
}
let protocol = this.protocol || "";
let pathname = this.pathname || "";
let hash = this.hash || "";
let host: string | undefined;
let query = "";
if (this.host) {
host = auth + this.host;
} else if (this.hostname) {
host = auth + (this.hostname.indexOf(":") === -1 ?
this.hostname :
"[" + this.hostname + "]");
if (this.port) {
host += ":" + this.port;
}
}
if (this.query !== null && typeof this.query === "object")
query = formatQuery(this.query);
let search = this.search || (query && ("?" + query)) || "";
if (protocol && protocol.charCodeAt(protocol.length - 1) !== 58/*:*/)
protocol += ":";
let newPathname = "";
let lastPos = 0;
for (let i = 0; i < pathname.length; ++i) {
switch (pathname.charCodeAt(i)) {
case 35: // '#'
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += "%23";
lastPos = i + 1;
break;
case 63: // '?'
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += "%3F";
lastPos = i + 1;
break;
}
}
if (lastPos > 0) {
if (lastPos !== pathname.length)
pathname = newPathname + pathname.slice(lastPos);
else
pathname = newPathname;
}
// only the slashedProtocols get the //. Not mailto:, xmpp:, etc.
// unless they had them to begin with.
if (this.slashes || (!protocol || slashedProtocol[protocol]) && host !== undefined) {
host = "//" + (host || "");
if (pathname && pathname.charCodeAt(0) !== 47/*/*/)
pathname = "/" + pathname;
} else if (!host) {
host = "";
}
search = search.replace("#", "%23");
if (hash && hash.charCodeAt(0) !== 35/*#*/) hash = "#" + hash;
if (search && search.charCodeAt(0) !== 63/*?*/) search = "?" + search;
return protocol + host + pathname + search + hash;
}
/**
* 发送当前的请求。
* @return 如果请求发送成功则返回 true，否则返回 false。
*/
send() {
// 设置属性默认值。
this.type = this.type || "GET";
this.url = this.url || location.href;
if (this.data != null && !(this.data instanceof FormData)) {
this.contentType = this.contentType || "application/x-www-form-urlencoded";
if (typeof this.data === "object") {
this.data = this.contentType === "application/json" && this.type !== "GET" ? JSON.stringify(this.data) : formatQuery(this.data);
}
if (this.type === "GET") {
this.url += (this.url.indexOf("?") >= 0 ? "&" : "?") + this.data;
this.data = null;
}
}
this.async = this.async !== false;
// 准备请求。
const xhr = this.xhr = new XMLHttpRequest();
const end: Ajax["_end"] = this._end = (message, inerternalError) => {
try {
// 不重复执行回调。
// 忽略 onreadystatechange 最后一次之前的调用。
if (!this._end || (!inerternalError && xhr.readyState !== 4)) {
return;
}
delete this._end;
// 删除 readystatechange 。
xhr.onreadystatechange = null!;
// 判断是否存在错误。
if (inerternalError) {
this.status = inerternalError;
// 手动中止请求。
if (xhr.readyState !== 4) {
xhr.abort();
}
} else {
this.status = xhr.status;
try {
this.statusText = xhr.statusText;
} catch (firefoxCrossDomainError) {
// 如果跨域，火狐会报错。
this.statusText = "";
}
if (checkStatus(this.status)) {
try {
this.responseText = xhr.responseText;
} catch (ieResponseTextError) {
// IE6-9：请求二进制格式的文件报错。
this.responseText = "";
}
message = null;
} else {
message = this.status + ": " + this.statusText;
}
}
} catch (firefoxAccessError) {
return end(firefoxAccessError, -5);
}
// 执行用户回调。
if (message) {
this.error && this.error(message, this);
} else {
this.success && this.success(this.responseText, this);
}
this.complete && this.complete(message, this);
};
// 发送请求。
try {
if (this.username) {
xhr.open(this.type, this.url, this.async, this.username, this.password);
} else {
xhr.open(this.type, this.url, this.async);
}
} catch (ieOpenError) {
// IE: 地址错误时可能产生异常。
end(ieOpenError, -3);
return false;
}
for (const header in this.headers) {
try {
xhr.setRequestHeader(header, this.headers[header]);
} catch (firefoxSetHeaderError) {
// FF: 跨域时设置头可能产生异常。
}
}
if (this.contentType) {
try {
xhr.setRequestHeader("Content-Type", this.contentType);
} catch (firefoxSetHeaderError) {
// FF: 跨域时设置头可能产生异常。
}
}
if (this.withCredentials) {
xhr.withCredentials = true;
}
try {
xhr.send(this.data);
} catch (sendError) {
// 地址错误时产生异常 。
end(sendError, -4);
return false;
}
// 同步时火狐不会自动调用 onreadystatechange
if (!this.async) {
end(null, 0);
return true;
}
// 绑定 onreadystatechange， 让 xhr 根据请求情况调用 done。
xhr.onreadystatechange = end as any;
if (this.timeout >= 0) {
setTimeout(() => {
end("Timeout", -2);
}, this.timeout);
}
return true;
}