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Ajax.js
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Ajax.js
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/**
* @name CeL function for Ajax (Asynchronous JavaScript and XML)
* @fileoverview 本檔案包含了模擬WWW客戶端發送HTTP/HTTPS請求用的 functions。
* @since 2015/1/1
*/
'use strict';
// 'use asm';
// --------------------------------------------------------------------------------------------
// 不採用 if 陳述式,可以避免 Eclipse JSDoc 與 format 多縮排一層。
typeof CeL === 'function' && CeL.run({
// module name
name : 'application.net.Ajax',
// Promise for fetch()
require : 'data.code.compatibility.'
// library_namespace.copy_properties()
+ '|data.native'
// MIME_of()
+ '|application.net.MIME.'
// for CeL.to_file_name(), CeL.URI, CeL.Search_parameters
+ '|application.net.',
// 設定不匯出的子函式。
// no_extend : '*',
// 為了方便格式化程式碼,因此將 module 函式主體另外抽出。
code : module_code
});
function module_code(library_namespace) {
function time_message(millisecond) {
if (library_namespace.age_of) {
return library_namespace.age_of(0, millisecond, {
digits : 1
});
}
return millisecond % 1000 === 0 ? millisecond / 1000 + 's'
: millisecond + 'ms';
}
// "Error: socket hang up" {code: 'ECONNRESET'}
// "Error: connect ETIMEDOUT 1.1.1.1:80"
// {errno:'ETIMEDOUT', code: 'ETIMEDOUT', address: '125.89.70.31', port:80 }
// Error: connect ECONNREFUSED 127.0.0.1:443
// "Error: read ECONNRESET"
// {errno: 'ECONNRESET', code: 'ECONNRESET', syscall: 'read'}
// Error: getaddrinfo ENOTFOUND domain
// ERROR_BAD_STSTUS
// Error: Timeout 30s
function localize_error(error) {
var message = String(error);
if (library_namespace.gettext) {
// 處理特別的錯誤訊息。
var matched = message
.match(/^(Error: (?:(?:connect|getaddrinfo) E[A-Z]+|Timeout) )(.+)$/);
if (matched) {
message = [ matched[1] + '%1', matched[2] ];
}
message = Array.isArray(message)
// gettext_config:{"id":"error-connect-etimedout-$1","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-connect-econnrefused-$1","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-getaddrinfo-enotfound-$1","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-timeout-$1","mark_type":"combination_message_id"}
? library_namespace.gettext.apply(null, message)
// gettext_config:{"id":"error-socket-hang-up","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-read-econnreset","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-write-econnaborted","mark_type":"combination_message_id"}
// gettext_config:{"id":"error-unexpected-end-of-file","mark_type":"combination_message_id"}
: library_namespace.gettext(message);
}
return message;
}
var
/** {Number}未發現之index。 const: 基本上與程式碼設計合一,僅表示名義,不可更改。(=== -1) */
NOT_FOUND = ''.indexOf('_');
/**
* null module constructor
*
* @class web Ajax 的 functions
*/
var _// JSDT:_module_
= function() {
// null module constructor
};
/**
* for JSDT: 有 prototype 才會將之當作 Class
*/
_// JSDT:_module_
.prototype = {};
// ---------------------------------------------------------------------//
// XMLHttp set ajax通信処理ライブラリ ==================
/**
* <code>
to use: include in front:
way1(good: 以reg代替functionPath!):
// [function.js]_iF
// [function.js]End
way2(old):
// [function.js]getU,functionPath,'eval(getU(functionPath));'
// [function.js]End
old:
function getU(p){var o;try{o=new ActiveXObject('Microsoft.XMLHTTP');}catch(e){o=new XMLHttpRequest();}if(o)with(o){open('GET',p,false),send(null);return responseText;}}
</code>
*/
/**
* JScript or .wsh only, 能 encode.
*
* @param {String}page_url
* page url
* @param {String}[charset]
* character encoding of HTML web page. e.g., 'UTF-8', big5,
* euc-jp, ...
* @param POST_text
* POST text
*
* @returns {String}
* @see http://neural.cs.nthu.edu.tw/jang/books/asp/getWebPage.asp?title=10-1%20%E6%8A%93%E5%8F%96%E7%B6%B2%E9%A0%81%E8%B3%87%E6%96%99
*/
function get_page(page_url, charset, POST_text) {
try {
// may cause error
var X = new ActiveXObject('Microsoft.XMLHTTP'), AS;
X.open(POST_text ? 'POST' : 'GET', page_url, false);
// POST need this
X.setRequestHeader("Content-Type",
"application/x-www-form-urlencoded");
// Download the file
X.send(POST_text || null);
AS = new ActiveXObject("ADODB.Stream");
// 可同時進行讀寫
AS.Mode = 3;
// 以二進位方式操作
AS.Type = 1;
// 開啟物件
AS.Open();
// 將 binary 的資料寫入物件內 may error
AS.Write(X.responseBody);
AS.Position = 0;
// 以文字模式操作
AS.Type = 2;
// 設定編碼方式
if (charset)
AS.Charset = charset;
// 將物件內的文字讀出
X = AS.ReadText();
// Release memory. 釋放被占用的記憶體.
AS = null;
return X;
} catch (e) {
library_namespace.warn('get_page: ' + e.message);
}
}
// ---------------------------------------------------------------------//
var KEY_URL = typeof Symbol === 'function' ? Symbol('URL')
: '\0URL to fetch';
/**
*
* @param URL_to_fetch
* @param search
* @param hash
* @returns
*
* @inner
*/
function set_parameters_and_hash(URL_to_fetch, search, hash) {
// URL_to_fetch = library_namespace.URI(URL_to_fetch);
// assert: library_namespace.is_URI(URL_to_fetch)
if (hash || hash === '') {
if (Object.defineProperty[KEY_not_native] && !/^#/.test(hash))
hash = '#' + hash;
URL_to_fetch.hash = hash;
}
URL_to_fetch.search_params.set_parameters(search);
// console.trace(URL_to_fetch.toString(charset));
return URL_to_fetch;
}
function normalize_URL_to_fetch(URL_to_fetch, charset, options) {
// console.trace(URL_to_fetch);
// https://developer.mozilla.org/en-US/docs/Web/API/URL
// [ origin + pathname, search, hash ]
// hrer = [].join('')
if (Array.isArray(URL_to_fetch)) {
URL_to_fetch = set_parameters_and_hash(library_namespace
.URI(URL_to_fetch[0]), URL_to_fetch[1], URL_to_fetch[2]);
if (charset)
URL_to_fetch.charset = charset;
} else {
// 當輸入 {URL} 時,node_https.request() 會將 {URL} 轉成
// {Object}options,不會考慮額外選項 (headers, ...)。
// 且必須處理 charset,乾脆直接將 {URL} 轉成尋常 plain object / {URI}。
// https://nodejs.org/api/http.html#http_http_request_url_options_callback
// If url is a string, it is automatically parsed with new URL(). If
// it is a URL object, it will be automatically converted to an
// ordinary options object.
// console.trace([ URL_to_fetch, charset ]);
URL_to_fetch = library_namespace.URI(URL_to_fetch, null, {
charset : charset
});
// console.trace(URL_to_fetch);
}
// assert: library_namespace.is_URI(URL_to_fetch)
// console.trace(URL_to_fetch);
if (options.search || options.hash) {
URL_to_fetch = set_parameters_and_hash(URL_to_fetch,
options.search, options.hash);
}
library_namespace.debug({
T : [ 'Fetching URL: %1', '{' + (typeof URL_to_fetch) + '} ['
//
+ (typeof URL_to_fetch === 'string' ? URL_to_fetch
//
: URL_to_fetch && URL_to_fetch[KEY_URL]
//
|| URL_to_fetch.toString(charset)) + ']' ]
}, 1, 'normalize_URL_to_fetch');
return URL_to_fetch;
}
if (false)
// default arguments
var get_URL_arguments = {
URL : '',
charset : '',
// HTTP方法,如"GET", "POST", HEAD, "PUT", "DELETE"等。
method : 'GET',
post_data : {},
async : true,
// user name. 驗證用使用者名稱。
user : '',
// 驗證用密碼。
password : '',
// header
headers : {
contentType : 'text/xml'
},
// location.search
search : {
contentType : 'text/xml'
},
// location.hash
hash : '',
mime : 'text/xml',
// onreadystatechange
onchange : function() {
},
timeout : 0,
onfail : function(error) {
this.status;
},
onload : function() {
}
};
// XMLHttp.readyState 所有可能的值如下:
// 0 還沒開始
// 1 讀取中 Sending Data
// 2 已讀取 Data Sent
// 3 資訊交換中 interactive: getting data
// 4 一切完成 Completed
var readyState_done = 4,
//
document_head = library_namespace.is_WWW(true)
&& (document.head || document.getElementsByTagName('head')[0]);
/**
* 讀取 URL via XMLHttpRequest。
*
* @param {String|Object}URL_to_fetch
* 欲請求之目的 URL or options
* @param {Function}[onload]
* callback when successful loaded
* @param {String}[charset]
* character encoding of HTML web page. e.g., 'UTF-8', big5,
* euc-jp, ...
* @param {String|Object}[post_data]
* text data to send when method is POST
* @param {Object}[options]
* 附加參數/設定選擇性/特殊功能與選項
*
* TODO: 代理伺服器 using proxy server
*
* @see https://developer.mozilla.org/zh-TW/docs/DOM/XMLHttpRequest
* http://msdn.microsoft.com/en-us/library/ie/ms535874.aspx
*/
function get_URL(URL_to_fetch, onload, charset, post_data, options) {
// 前導作業。
if (library_namespace.is_Object(charset) && !options) {
options = post_data;
post_data = charset;
charset = null;
}
// 正規化並提供可隨意改變的同內容參數,以避免修改或覆蓋附加參數。
options = library_namespace.new_options(options);
// ------------------------------------------------------
if (library_namespace.is_Object(URL_to_fetch) && URL_to_fetch[KEY_URL]) {
Object.assign(options, URL_to_fetch);
// 注意: options.onload 另有用途!
// https://xhr.spec.whatwg.org/#handler-xhr-onloadstart
// onload = options.onload || onload;
post_data = options.post || post_data;
charset = options.charset || charset;
URL_to_fetch = options[KEY_URL];
}
URL_to_fetch = normalize_URL_to_fetch(URL_to_fetch, charset, options);
// assert: library_namespace.is_URI(URL_to_fetch)
if (typeof onload === 'object') {
library_namespace.debug(
'Trying to JSONP, insert page, need callback.', 3,
'get_URL');
// library_namespace.run(URL_to_fetch);
for ( var callback_param in onload) {
library_namespace.debug('Trying ('
+ (typeof onload[callback_param]) + ') ['
+ callback_param + '] = [' + onload[callback_param]
+ ']', 3, 'get_URL');
if (callback_param
&& typeof onload[callback_param] === 'function') {
var callback_name, node = document.createElement('script');
for (charset = 0; (callback_name = 'cb' + charset) in library_namespace;)
charset++;
library_namespace[callback_name] = function(data) {
library_namespace.debug('[' + URL_to_fetch
+ ']: callback 完自動移除 .js。', 2, 'get_URL');
document_head.removeChild(node);
// Release memory. 釋放被占用的記憶體.
node = null;
delete library_namespace[callback_name];
onload[callback_param](data);
};
// callback_param: callback parameter
URL_to_fetch.search_params[callback_param] = library_namespace.Class
+ '.' + callback_name;
node.src = URL_to_fetch.toString();
library_namespace.debug('Use script node: [' + node.src
+ ']', 3, 'get_URL');
document_head.appendChild(node);
return;
}
}
library_namespace.debug('Skip JSONP. No callback specified.', 3,
'get_URL');
}
if (post_data && !options.form_data) {
post_data = library_namespace.Search_parameters(post_data)
.toString(charset);
}
if (!onload && typeof options.onchange === 'function') {
onload = function() {
options.onchange(readyState_done, XMLHttp);
};
}
if (options.async === false && onload || typeof onload !== 'function') {
onload = false;
}
/**
* The XMLHttpRequest object can't be cached.
*/
var XMLHttp = library_namespace.new_XMLHttp();
try {
// IE:404 會 throw error, timeout 除了 throw error,
// 還會 readystatechange;
// Gecko 亦會 throw error
// IE 10 中,local file 光 .open() 就 throw 了。
XMLHttp.open(options.method || (post_data ? 'POST' : 'GET'),
URL_to_fetch.toString(), !!onload, options.user || '',
options.password || '');
// https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/response
// XMLHttp.responseType = 'blob';
if (options.timeout > 0 && !onload) {
// https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/timeout
XMLHttp.timeout = options.timeout;
if (typeof options.onfail === 'function')
XMLHttp.ontimeout = function(e) {
options.onfail.call(XMLHttp, e || 'Timeout');
};
}
// TODO: 處理有 onload 下之 timeout 逾時ms數
// Ajax 程式應該考慮到 server 沒有回應時之處置
if (library_namespace.is_Object(options.headers)
// https://developer.mozilla.org/zh-TW/docs/Web/API/XMLHttpRequest/setRequestHeader
// `!!XMLHttp.setRequestHeader` will throw @ HTA (HTML Application)
&& ('setRequestHeader' in XMLHttp)) {
Object.keys(options.headers).forEach(function(key) {
XMLHttp.setRequestHeader(key, options.headers[key]);
});
}
if (options.mime) {
// ignore charset!
charset = options.mime;
} else if (charset) {
// old: 'text/xml;charset=' + charset
// 但這樣會被當作 XML 解析,產生語法錯誤。
// TODO: try:
// 'text/'+(/\.x(ht)?ml$/i.test(URL_to_fetch)?'xml':'plain')+';charset='
// + charset;
charset = 'application/json;charset=' + charset;
}
// 有些版本的 Mozilla 瀏覽器在伺服器送回的資料未含 XML mime-type
// 檔頭(header)時會出錯。為了避免這個問題,可以用下列方法覆寫伺服器傳回的檔頭,以免傳回的不是 text/xml。
// http://squio.nl/blog/2006/06/27/xmlhttprequest-and-character-encoding/
// http://www.w3.org/TR/XMLHttpRequest/ search encoding
if (charset && XMLHttp.overrideMimeType)
XMLHttp.overrideMimeType(charset);
if (onload) {
XMLHttp.onreadystatechange = function() {
if (XMLHttp.readyState === readyState_done)
return onload(XMLHttp);
if (0 < XMLHttp.readyState
&& XMLHttp.readyState < readyState_done) {
if (typeof options.onchange === 'function')
options.onchange(XMLHttp.readyState, XMLHttp);
} else if (typeof options.onfail === 'function') {
options.onfail(XMLHttp);
}
};
}
// 若檔案不存在,會 throw。
XMLHttp.send(post_data || null);
if (!onload) {
// XMLHttp.response blob
// XMLHttp.responseText 會把傳回值當字串用
// XMLHttp.responseXML 會把傳回值視為 XMLDocument 物件,而後可用 JavaScript
// DOM 相關函式處理
// IE only(?):
// XMLHttp.responseBody 以unsigned array格式表示binary data
// try{responseBody=(new
// VBArray(XMLHttp.responseBody)).toArray();}catch(e){}
// http://aspdotnet.cnblogs.com/archive/2005/11/30/287481.html
// XMLHttp.responseStream return AdoStream
return XMLHttp.responseText;
}
} catch (e) {
library_namespace.error(e);
if (typeof options.onfail === 'function') {
options.onfail(XMLHttp, e);
} else if (onload) {
onload(undefined, e);
}
}
}
_.get_URL = get_URL;
// TODO: 處理 multiple requests
function get_URLs() {
}
// ----------------------------------------------------
var is_nodejs = library_namespace.platform.nodejs;
/**
* <code>
// "file": keyword for "Content-Disposition: file;"
{type:'jpg',image:{file:'fn1.jpg'}}
// will fetch url first.
{type:'jpg',image:{url:'http://host/'}}
{type:'jpg',image:{file:'fn1.jpg',type:'image/jpeg'}}
// Array: use "Content-Type: multipart/mixed;"
{type:'jpg',images:[{file:'fn1.jpg'},{file:'fn2.jpg'}]}
{type:'jpg',images:[{file:'fn1.jpg'},{file:'fn2.jpg'}],docs:[{file:'fn1.txt'},{file:'fn2.txt'}]}
{type:'jpg',images:[{file:'fn1.jpg',type:'image/jpeg'},{file:'fn1.txt',type:'text/plain'}]}
</code>
*/
// should be CRLF
// @see https://tools.ietf.org/html/rfc7578#section-4.1
var form_data_new_line = '\r\n';
function form_data_to_Array(is_slice) {
if (this.generated) {
return this.generated;
}
var boundary = '--' + this.boundary + form_data_new_line,
// generated raw post data
generated = this.generated = [ boundary ], content_length = boundary.length;
boundary = form_data_new_line + boundary;
this.forEach(function(chunk, index) {
if (Array.isArray(chunk)) {
// chunk = chunk.to_Array(true);
if (!chunk.content_length) {
console.log(chunk);
throw new Error(
// gettext_config:{"id":"the-chunk-do-not-has-regular-.content_length"}
'The chunk do not has regular .content_length!');
}
content_length += chunk.content_length;
} else {
// chunk: {String} or {Buffer}
content_length += chunk.length;
}
generated.push(chunk);
if (index < this.length - 1) {
generated.push(boundary);
content_length += boundary.length;
}
}, this);
if (!(content_length > 0)) {
console.log(this);
// gettext_config:{"id":"illegal-chunk.content_length"}
throw new Error('Illegal chunk.content_length!');
}
boundary = form_data_new_line + '--' + this.boundary;
if (!is_slice) {
boundary += '--';
}
generated.push(boundary);
content_length += boundary.length;
generated.content_length = content_length;
// console.log(generated);
return generated;
}
// 選出 data.generated 不包含之 string
function give_boundary(data_Array) {
function not_includes_in(item) {
// console.trace([ typeof item, item ]);
return Array.isArray(item) ? item.every(not_includes_in)
// item: Should be {String} or {Buffer}
: !item.includes(boundary);
}
var boundary, retry_count = 0;
while (retry_count++ < 8) {
boundary = (Number.MAX_SAFE_INTEGER * Math.random())
.toString(10 + 26);
// console.log('test boundary: [' + boundary + ']');
for (var i = 1; i < boundary.length / 2 | 0; i++) {
var slice = boundary.slice(0, i);
if (boundary.lastIndexOf(slice) > 0) {
boundary = null;
break;
}
}
// assert: boundary 不自包含,例如 'aa'自包含'a','asas'自包含'as'
if (boundary) {
if (not_includes_in(data_Array)) {
data_Array.boundary = boundary;
return boundary;
}
}
}
throw new Error('give_boundary: '
// gettext_config:{"id":"retry-too-many-times"}
+ 'Retry too many times!');
}
var to_form_data_generated = {
form_data_generated : true
};
// https://github.com/form-data/form-data/blob/master/lib/form_data.js
// https://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2
// https://tools.ietf.org/html/rfc7578
// https://tools.ietf.org/html/rfc2046#section-5.1
// The "multipart" boundary delimiters and header fields are always
// represented as 7bit US-ASCII
// https://tools.ietf.org/html/rfc2049#appendix-A
// http://stackoverflow.com/questions/4238809/example-of-multipart-form-data
function to_form_data(parameters, callback, options) {
function get_file_object(value, callback, key, slice) {
var is_url, MIME_type;
if (typeof value === 'string') {
is_url = value.includes('://');
} else
// else: assert: library_namespace.is_Object(value)
if (is_url = value.url) {
value = is_url;
// is_url = true;
} else {
// .type: MIME type
MIME_type = value.type;
// value: file_path
value = value.file;
}
function push_and_callback(MIME_type, content) {
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition
var headers = 'Content-Disposition: '
+ (slice ? 'file' : 'form-data; name="' + key + '"')
+ '; filename="' + encodeURIComponent(value) + '"'
+ "; filename*=UTF-8''" + encodeURIComponent(value)
+ form_data_new_line;
if (MIME_type) {
headers += 'Content-Type: ' + MIME_type
+ form_data_new_line;
}
if (is_nodejs && Buffer.isBuffer(content)) {
headers += 'Content-Transfer-Encoding: binary'
+ form_data_new_line;
}
headers += form_data_new_line;
var chunk = [ headers, content ];
// 手動設定 Content-Length。
chunk.content_length = headers.length + content.length;
// TODO: use stream
(slice || root_data).push(chunk);
callback();
}
if (!is_url) {
var content;
// read file contents
if (is_nodejs) {
try {
// get {Buffer}
content = node_fs.readFileSync(value);
} catch (e) {
// When we cannot read, it will throw now.
// e.g., Error: ENOENT: no such file or directory, open
// 'value'
}
} else {
// node.js 之下此方法不能處理 binary data。
content = library_namespace
.get_file(value/* , 'binary' */);
}
if (!content) {
library_namespace.error([ 'to_form_data: ', {
// gettext_config:{"id":"failed-to-get-file-$1"}
T : [ 'Failed to get file: [%1]', value ]
} ]);
// Skip this one.
callback();
return;
}
if (options && options.file_post_processor) {
options.file_post_processor(value, content);
}
// value: file path → file name
value = value.match(/[^\\\/]*$/)[0];
if (!MIME_type) {
MIME_type = library_namespace.MIME_of(value);
}
push_and_callback(MIME_type, content);
return;
}
library_namespace.debug({
// gettext_config:{"id":"fetching-url-$1"}
T : [ '自網路取得 URL:%1', value ]
}, 1, 'to_form_data');
_.get_URL(value, function(XMLHttp, error) {
if (options && options.url_post_processor) {
options.url_post_processor(value, XMLHttp, error);
}
if (error) {
library_namespace.error([ 'to_form_data: ', {
// gettext_config:{"id":"got-error-when-retrieving-$1-$2"}
T : [ 'Got error when retrieving [%1]: %2',
//
value, localize_error(error) ]
} ]);
// Skip this one.
callback();
return;
}
// value: url → file name
value = value.replace(/[?#].*$/, '')
.match(/([^\\\/]*)[\\\/]?$/)[1];
// console.log('-'.repeat(79));
// console.log(value);
library_namespace.debug({
// gettext_config:{"id":"got-url-from-the-network-$1-$2-bytes"}
T : [ '自網路取得 URL:%1,%2{{PLURAL:%2|位元組}}。', value,
XMLHttp.buffer.length ]
}, 1, 'to_form_data');
push_and_callback(XMLHttp.type, XMLHttp.buffer);
}, 'buffer');
}
parameters = library_namespace.Search_parameters(parameters);
var root_data = [], keys = Object.keys(parameters), index = 0;
root_data.to_Array = form_data_to_Array;
// console.log('-'.repeat(79));
// console.log(keys);
// 因為在遇到fetch url時需要等待,因此採用async。
function process_next() {
if (false) {
console.log('-'.repeat(60));
console.log('process_next: ' + index + '/' + keys.length);
console.log(root_data);
}
if (index === keys.length) {
// 決定 boundary
give_boundary(root_data);
// WARNING: 先結束作業: 生成 .to_Array(),
// 才能得到 root_data.to_Array().content_length。
root_data.to_Array();
if (false) {
console.log('-'.repeat(79));
console.log(root_data);
console.log('-'.repeat(79));
console.log(root_data.to_Array().content_length);
console.log(root_data.to_Array().join(''));
throw 5;
}
callback(root_data);
return;
}
var key = keys[index++], value = parameters[key];
// console.log(key + ': ' + JSON.stringify(value));
if (Array.isArray(value)) {
// assert: is files/urls
var slice = [], item_index = 0,
//
next_item = function() {
if (item_index === value.length) {
give_boundary(slice);
var headers = 'Content-Disposition: form-data; name="'
+ key + '"' + form_data_new_line
+ 'Content-Type: multipart/mixed; boundary='
+ slice.boundary + form_data_new_line
+ form_data_new_line;
slice = form_data_to_Array.call(slice, true);
slice.unshift(headers);
slice.content_length += headers.length;
root_data.push(slice);
process_next();
} else {
get_file_object(value[item_index++], next_item,/* key */
undefined, slice);
}
};
next_item();
return;
}
if (library_namespace.is_Object(value)) {
// assert: is file/url
get_file_object(value, process_next, key);
return;
}
// 預防有 null, undefined, {Number}, true 之類。
if (!value || typeof value === 'number'
|| typeof value === 'boolean') {
value = String(value);
}
var headers;
if (is_nodejs && typeof value === 'string') {
value = Buffer.from(value, 'utf8');
headers = 'Content-Type: text/plain; charset=UTF-8'
+ form_data_new_line;
}
// 非檔案,屬於普通的表單資料。
if (!key) {
throw new Error('No key for value: ' + value);
}
if (!value && value !== '') {
// e.g., token=undefined
throw new TypeError('Invalid type of ' + key + ': '
+ typeof value);
}
// @see function push_and_callback(MIME_type, content)
headers = 'Content-Disposition: form-data; name="' + key + '"'
+ form_data_new_line + (headers || '') + form_data_new_line;
var chunk = [ headers, value ];
// 手動設定 Content-Length。
chunk.content_length = headers.length + value.length;
root_data.push(chunk);
process_next();
}
process_next();
return root_data;
}
_.to_form_data = to_form_data;
// ---------------------------------------------------------------------//
/**
* <code>
讀取URL by XMLHttpRequest
http://jck11.pixnet.net/blog/post/11630232
* 若有多行程或為各URL設定個別XMLHttp之必要,請在一開始便設定deprecated_get_URL.multi_request,並且別再更改。
** 在此情況下,單一URL仍只能有單一個request!
** 設定 handle_function 須注意程式在等待回應時若無執行其他程式碼將自動中止!
可設定:
while(deprecated_get_URL.doing)WScript.Sleep(1); //||timeout
arguments f:{
URL:'', // The same origin policy prevents document or script loaded from one origin, from getting or setting properties from a of a document from a different origin.(http://www.mozilla.org/projects/security/components/jssec.html#sameorigin)
enc:'UTF-8', // charset: big5, euc-jp,..
fn:(handle_function), // onLoad:function(){},
method:'GET', // POST,..
sendDoc:'text send in POST,..'
async:ture/false, // true if want to asynchronous(非同期), false if synchronous(同期的,會直到readyState==4才return) http://jpspan.sourceforge.net/wiki/doku.php?id=javascript:xmlhttprequest:behaviour
user:'userName',
passwd:'****', // password
//TODO:
parameters:'~=~&~=~', // {a:1,b:2}
header:{contentType:'text/xml'},
contentType:'text/xml',
run:true/false, // do eval
update:DOMDocument, // use onLoad/onFailed to 加工 return text. onFailed(){throw;} will abort change.
interval:\d,
decay:\d, // wait decay*interval when no change
maxInterval::\d,
//insertion:top/bottom,..
onFailed:function(error){this.status;}, // onFailed.apply(XMLHttp,[XMLHttp.status])
onStateChange:function(){},
}
handle_function:
自行處理 typeof handle_function=='function':
function handle_function(error){..}
代為處理 handle_function=[d_func,0: responseText,1: responseXML]:
responseXML: http://msdn2.microsoft.com/en-us/library/ms757878.aspx
function d_func(content,headers[,XMLHttp,URL]){
if(headers){
// content,headers各為XMLHttp.responseText內容及XMLHttp.getAllResponseHeaders(),其他皆可由XMLHttp取得。
}else{
// content為error
}
}
e.g., the simplest: [function(c,h){h&&alert(c);}]
)
</code>
*/
// (URL,fn) or flag URL, handle_function handle result,
// method,sendDoc,asyncFlag,userName,password
function deprecated_get_URL(f) {
var _f = arguments.callee;
if (typeof _f.XMLHttp === 'object') {
// try{_f.XMLHttp.abort();}catch(e){}
// 此時可能衝突或lose?!
_f.XMLHttp = null;
}
// 處理 arguments
if (!library_namespace.is_Object(f))
a = arguments, f = {
URL : f,
fn : a[1],
method : a[2],
sendDoc : a[3]
};
if (f.post)
f.method = 'POST', f.sendDoc = f.post;
if (!f[KEY_URL]
|| !(_f.XMLHttp = library_namespace.new_XMLHttp(f.enc,
!/\.x(?:ht)?ml$/i.test(f[KEY_URL]))))
// throw
return;
// try{_f.XMLHttp.overrideMimeType('text/xml');}catch(e){}
if (typeof f.async !== 'boolean')
// 設定f.async
f.async = f.fn ? true : false;
else if (!f.async)
f.fn = null;
else if (!f.fn)
if (typeof _f.HandleStateChange !== 'function'
|| typeof _f.HandleContent !== 'function')
// 沒有能處理的function
// throw
return;
else
// =null;
f.fn = _f.HandleContent;
if (/* typeof _f.multi_request!=='undefined'&& */_f.multi_request) {
if (!_f.q)
// queue
_f.i = {}, _f.q = [];
// ** 沒有考慮到 POST 時 URL 相同的情況!
_f.i[f[KEY_URL]] = _f.q.length;
_f.q.push({
uri : f[KEY_URL],
XMLHttp : _f.XMLHttp,
func : f.fn,
start : _f.startTime = new Date
});
} else if (_f.q && typeof _f.clean === 'function')
_f.clean();
// for Gecko Error: uncaught exception: Permission denied to call method
// XMLHttpRequest.open
if (f[KEY_URL].indexOf('://') !== NOT_FOUND
&& typeof netscape === 'object')
if (_f.asked > 2) {
_f.clean(f[KEY_URL]);
return;
} else
try {
if (typeof _f.asked === 'undefined') {
_f.asked = 0;
alert('我們需要一點權限來使用 XMLHttpRequest.open。\n* 請勾選記住這項設定的方格。');
}
netscape.security.PrivilegeManager
// UniversalBrowserAccess
.enablePrivilege('UniversalXPConnect');
} catch (e) {
_f.asked++;
_f.clean(f[KEY_URL]);
return;
}
// if(isNaN(_f.timeout))_f.timeout=300000;//5*60*1000;
try {
// IE:404會throw error, timeout除了throw error, 還會readystatechange;
// Gecko亦會throw error
try {
_f.XMLHttp.setRequestHeader("Accept-Encoding",
"gzip, deflate, br");
} catch (e) {
}
// Set header so the called script knows that it's an XMLHttpRequest
if (false)
_f.XMLHttp.setRequestHeader("X-Requested-With",
"XMLHttpRequest");
// Set the If-Modified-Since header, if ifModified mode.
if (false)
_f.XMLHttp.setRequestHeader("If-Modified-Since",
"Thu, 01 Jan 1970 00:00:00 GMT");
if (f.method === 'POST'
// &&_f.XMLHttp.setRequestHeader
) {
// use .getAttribute('method') to get 長度不一定如此
if (false)
_f.XMLHttp.setRequestHeader("Content-Length",
f.sendDoc.length);
// 有些CGI會用Content-Type測試是XMLHttp或是regular form
// It may be necessary to specify
// "application/x-www-form-urlencoded" or "multipart/form-data"
// for posted XML data to be interpreted on the server.
_f.XMLHttp.setRequestHeader('Content-Type', Array.isArray(f.fn)
&& f.fn[1] ? 'text/xml'
// application/x-www-form-urlencoded; charset=utf-8
: 'application/x-www-form-urlencoded');
}
_f.XMLHttp.abort();