I have this function:
function tagCheck(tag:String,rez:String):String{
var regExp:RegExp = /\[user_id\](.*?)\[\/user_id\]/g;
var matches:Object = regExp.exec(rez);
return matches[1];
}
I wanna change "user_id" with tag, how can I do that because there are no string in regExp? thank you!
You can create a regex simply by creating a new RegExp class.
public function RegExp(re:String, flags:String)
function tagCheck(tag:String, rez:String) : String {
var tagRegex:String = tag.replace(new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\' + ('\/' || '') + '-]', 'g'), '\\$&');
var regExp:RegExp = new RegExp('\\[' + tagRegex + '\\](.*?)\\[\\/' + tagRegex + '\\]', 'g');
var matches:Object = regExp.exec(rez);
return matches[1];
}
Should work (though untested). The first line is to make sure that a tag called my.tag gets changed into my\.tag.
Related
I'm trying to do a check to see if the user has a local file. If the user does, I get bloodycrypto to make a md5 out of it. Then I compare the two values. One from the firebase file's metadata and the other from the byte array of the file digested. They never match. Does Firebase do something different when trying to generate the md5 of a file I upload?
private function handleMetaSuccess(e:StorageReferenceEvent):void
{
trace("Meta succes for reference:" + this.name);
storageMetaData = e.metadata;
trace("reading file.");
fileBA = new ByteArray();
var fs:FileStream = new FileStream();
fs.open(Definitions.CACHE_DIRECTORY.resolvePath(name + ".jpg"), FileMode.READ)
fs.readBytes(fileBA);
fs.close();
var byteHash:String = MD5.hashBytes(fileBA)
trace("Local hash = " + byteHash); //93b885adfe0da089cdf634904fd59f71
trace("Network hash = " + storageMetaData.md5Hash); //bo7XPotC+T5wmAcpagnXBw==
if (byteHash != storageMetaData.md5Hash)
{
trace("Not equal. Getting file."); //Always happens
getFile();
}
else
{
loadFile();
}
}
Upon closer inspetion (thanks to Organis) firebase doesn't return a proper MD5. What is it? In my storage consol I don't see an md5 property, so is this autogenerated? The files were uploaded through my rest API based off phantom's guide.
Update: Following Organis' comment about the way Firebase handle's MD5s
var byteHash:ByteArray = new ByteArray();
byteHash.writeUTFBytes(MD5.hashBytes(fileBA));
var byteHashWithLength:ByteArray = new ByteArray();
byteHashWithLength.writeUTF(MD5.hashBytes(fileBA));
trace("Bytehash with length = " + Base64.encode(byteHashWithLength)); //ACAyMTMzYTdmYjczYTEzZDQ3ZDkzMTEyY2I1OWQyYTBmMg==
trace("Plain = " + Base64.encode(byteHash)); //OTNiODg1YWRmZTBkYTA4OWNkZjYzNDkwNGZkNTlmNzE=
trace("Storage md5 = " + storageMetaData.md5Hash); //UsoNl5sL1+aLiAhTOTBXyQ==
Trying to take the md5 I get and turn it into base64 results in consistent mismatching results. Is there an argument I am missing or applying incorrectly when I try to decode everything?
...So I would do something like
var storageHash:String = Base64.decode(storageMetaData.md5Hash).toString();
to follow your example right?
Try this code below to get your storageMetaData.md5Hash correctly decoded from Base64 :
Let me know result of trace("storage hash : " + storageHash); to check if you're getting an (expected) sequence of 32 hex values.
private function handleMetaSuccess(e:StorageReferenceEvent):void
{
trace("Meta succes for reference:" + this.name);
storageMetaData = e.metadata;
trace("reading file.");
fileBA = new ByteArray();
var fs:FileStream = new FileStream();
fs.open(Definitions.CACHE_DIRECTORY.resolvePath(name + ".jpg"), FileMode.READ)
fs.readBytes(fileBA);
fs.close();
var byteHash:String = MD5.hashBytes(fileBA); //Local hash
var ba_storageHash:ByteArray = new ByteArray();
ba_storageHash = Base64.decode(storageMetaData.md5Hash); //update ByteArray
var storageHash:String = bytesToHexString(ba_storageHash); //Hex values of bytes shown as String
trace("Network hash : " + storageMetaData.md5Hash); //bo7XPotC+T5wmAcpagnXBw==
trace("Local hash : " + byteHash); //93b885adfe0da089cdf634904fd59f71
trace("storage hash : " + storageHash); //what is result??
if (byteHash != storageHash)
{
trace("Not equal. Getting file."); //Always happens
getFile();
}
else
{
loadFile();
}
}
// # Byte values (Hex) shown as (returned) String type
private function bytesToHexString(input:ByteArray) : String
{
var strOut:String = ""; var strRead:String = "";
input.position = 0;
var intBASize:uint = input.length;
for (var i:int = 0; i < intBASize; i++)
{
strRead = input.readUnsignedByte().toString(16);
if(strRead.length < 2) { strRead = "0" + strRead; } //# do padding
strOut += strRead ;
}
return strOut.toLowerCase(); //strOut.toUpperCase();
}
I wrote a small script in order to have an incremental ID composed by string character by using the function Utilities.formatString
Example: RQ001 -> RQ002 --> RQ00n
function myFunction() {
var str = "RQ001";
var res = str.substring(2, 5); 'ok
res=Number(res)+1; 'ok
res=res.toString(); 'ok
res = "RQ" & Utilities.formatString("000", res); 'not working }
The results is "0".
Thank you in advance for your help.
& is not string concatenation operator. Use "+" instead.
You have two issues. You need to use "+" for string concatenation and your method for creating your string isn't properly returning "002" like you want.
function myFunction() {
var str = "RQ001";
var res = Number(str.substring(2, 5)) + 1;
res = "000" + String(res);
res = "RQ" + res.substring(res.length - 3, res.length);
}
Use substring() to format your string's number and then append the "RQ" to the beginning afterwards.
You can also format the function to take the original key as a parameter. This way, you can say something like newKey = incrementKey(oldKey).
function incrementKey(str) {
var res = Number(str.substring(2, 5)) + 1;
res = "000" + String(res);
res = "RQ" + res.substring(res.length - 3, res.length);
return res;
}
My json string is coming as follows:
"[{\"StartTime\":\"09:00\",\"Dates\":\"05-28-2015\",\"Code\":\"DF\",\"LocationCode\":\"NY\"},{\"StartTime\":\"09:30\",\"Dates\":\"05-28-2015\",\"Code\":\"DF\",\"LocationCode\":\"NY\"},{\"StartTime\":\"10:00\",\"Dates\":\"05-28-2015\",\"Code\":\"DF\",\"LocationCode\":\"NY\"},{\"StartTime\":\"10:30\",\"Dates\":\"05-28-2015\",\"Code\":\"DF\",\"LocationCode\":\"NY\"},{\"StartTime\":\"11:30\",\"Dates\":\"05-28-2015\",\"Code\":\"DF\",\"LocationCode\":\"NY\"}]"
I need to parse this json string on view and show the data in a table.
I am new to json. Any help will be really appreciated. Thanks.
$("#divLoad").load("GetAvailableTimeSlots?strProvider=" + provider + "&strFrom=" + from, function (data) {
var newStr = data.replace('"[', '').replace(']"', '').replace('[', '').replace(']', '');
var dataArr = newStr.split('},{');
var jsonArr = new Array(dataArr.length);
for (var i = 0; i < dataArr.length; i++) {
dataArr[i] = '{' + dataArr[i] + '}';
var dataElem = dataArr[i].replace('{{', '{').replace('}}', '}');
var jsonElem = "'" + dataElem + "'";
jsonArr[i] = JSON.parse(jsonElem);
}
$(this).html(jsonArr);
});
If you are using jQuery, you can use the jQuery.parseJSON() method.
http://api.jquery.com/jquery.parsejson/
Just call JSON.parse(data) and manipulate the javascript object instead of performing error-prone string manipulation.
function (data) {
var locations = JSON.parse(data);
var table = $("<ul>");
for (var i = 0; i < locations.length; i++) {
var row = $("<li>").text(locations[i].StartTime + " " + locations[i].Dates + " " ...);
table.append(row);
}
$("#divLoad").empty().append(table); // $(this) won't work
}
This example is using an unordered list but you can easily replace this with table markup.
Here's what it looks like in Chrome dev tools with console.log(locations) after parsing:
I would like to know how would one parse an URL.
protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes
I need to get "this_is_what_i_want/even_if_it_has_slashes"
How should I do this?
Thanks!
Try this :
var u:String = 'protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes',
a:Array = u.split('/'),
s:String = ''
for(var i=0; i<a.length; i++){
if(i > 3){
s += '/'+a[i]
}
}
trace(s) // gives : /morethings/this_is_what_i_want/even_if_it_has_slashes
Another approach would be using Regex like this:
.*?mydomain\.com[^\/]*\/[^\/]+\/[^\/]+\/([^?]*)
(Breakdown of the components.)
This looks for a pattern where it skips whatever comes before the domain name (doesn't matter if the protocol is specified or not), skips the domain name + TLD, skips any port number, and skips the first two sub path elements. It then selects whatever comes after it but skips any query strings.
Example: http://regexr.com/39r69
In your code, you could use it like this:
var url:String = "protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes";
var urlExp:RegExp = /.*?mydomain\.com[^\/]*\/[^\/]+\/[^\/]+\/([^?]*)/g;
var urlPart:Array = urlExp.exec(url);
if (urlPart.length > 1) {
trace(urlPart[1]);
// Prints "this_is_what_i_want/even_if_it_has_slashes"
} else {
// No matching part of the url found
}
As you can see on the regexr link above, this captures the part "this_is_what_i_want/even_if_it_has_slashes" for all of these variations of the url:
protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes
protocol://mydomain.com:8080/something/morethings/this_is_what_i_want/even_if_it_has_slashes
protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes.html
protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes.html?hello=world
mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes
protocol://subdomain.mydomain.com:8080/something/morethings/this_is_what_i_want/even_if_it_has_slashes
Edit: Fixed typo in regexp string
Simple way,
var file:String = 'protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes';
var splitted:Array = file.split('/');
var str1:String = splitted.splice(3).join('/'); //returns 'something/morethings/this_is_what_i_want/even_if_it_has_slashes'
var str1:String = splitted.splice(5).join('/'); //returns 'this_is_what_i_want/even_if_it_has_slashes'
If you want to be a little more flexible in the feature (e.g. you need the domain), you can use my Url class.
Class for URL parsing
package
{
import flash.net.URLVariables;
public class Url
{
protected var protocol:String = "";
protected var domain:String = "";
protected var port:int = 0;
protected var path:String = "";
protected var parameters:URLVariables;
protected var bookmark:String = "";
public function Url(url:String)
{
this.init(url);
}
protected function splitSingle(value:String, c:String):Object
{
var temp:Object = {first: value, second: ""};
var pos:int = value.indexOf(c);
if (pos > 0)
{
temp.first = value.substring(0, pos);
temp.second = value.substring(pos + 1);
}
return temp;
}
protected function rtrim(value:String, c:String):String
{
while (value.substr(-1, 1) == c)
{
value = value.substr(0, -1);
}
return value;
}
protected function init(url:String):void
{
var o:Object;
var urlExp:RegExp = /([a-z]+):\/\/(.+)/
var urlPart:Array = urlExp.exec(url);
var temp:Array;
var rest:String;
if (urlPart.length <= 1)
{
throw new Error("invalid url");
}
this.protocol = urlPart[1];
rest = urlPart[2];
o = this.splitSingle(rest, "#");
this.bookmark = o.second;
rest = o.first;
o = this.splitSingle(rest, "?");
o.second = this.rtrim(o.second, "&");
this.parameters = new URLVariables();
if (o.second != "")
{
try
{
this.parameters.decode(o.second);
}
catch (e:Error)
{
trace("Warning: cannot decode URL parameters. " + e.message + " " + o.second);
}
}
rest = o.first
o = this.splitSingle(rest, "/");
if (o.second != "")
{
this.path = "/" + o.second;
}
rest = o.first;
o = this.splitSingle(rest, ":");
if (o.second != "")
{
this.port = parseInt(o.second);
}
else
{
switch (this.protocol)
{
case "https":
this.port = 443;
break;
case "http":
this.port = 80;
break;
case "ssh":
this.port = 22;
break;
case "ftp":
this.port = 21;
break;
default:
this.port = 0;
}
}
this.domain = o.first;
}
public function getDomain():String
{
return this.domain;
}
public function getProtocol():String
{
return this.protocol;
}
public function getPath():String
{
return this.path;
}
public function getPort():int
{
return this.port;
}
public function getBookmark():String
{
return this.bookmark;
}
public function getParameters():URLVariables
{
return this.parameters;
}
}
}
Example usage
try {
var myUrl:Url = new Url("protocol://mydomain.com/something/morethings/this_is_what_i_want/even_if_it_has_slashes");
trace("Protocol: " + myUrl.getProtocol());
trace("Domain: " + myUrl.getDomain());
trace("Path: " + myUrl.getPath());
trace("What you want: " + myUrl.getPath().split("/").splice(2).join("/") );
} catch (e:Error) {
trace("Warning: cannot parse url");
}
Output
Protocol: protocol
Domain: mydomain.com
Path: /something/morethings/this_is_what_i_want/even_if_it_has_slashes
What you want: morethings/this_is_what_i_want/even_if_it_has_slashes
Description
The init function checks with the regular expression if the given url starts with some letters (the protocol) followed by a colon, two slashes and more characters.
If the url contains a hash letter, everything behind its fist occurrence is taken as a bookmark
If the url contains a question mark, everything behind its fist occurrence is taken as key=value variables and parsed by the URLVariables class.
If the url contains a slash, everything behind its first occurrence is taken as the path
If the rest (everything between the last protocol slash and the first slash of the path) contains a colon, everything behind it will be converted to an integer and taken as the port. If the port is not set, a default will be set in dependency of the protocol
The rest is the domain
For answering your question, I use the path of the given url, split it by slash, cut of the 'something' and join it by slash.
I want to implement an alogorithm/validation. How can I find out if a string contains a specific character more than 6 times in Flex ?
There are 2 ways, I can think of:
Use RegExp and .replace() like this:
var ch:String = "a"; //Character, that must be checked
var text:String = "This is an example to show how many times '"+ch+"' occured.";
//Matches non-`ch` characters
var regexp:RegExp = new RegExp("[^"+ch+"]","g");
//Replacing non-`ch` characters with empty string
var timesOccured:Number = text.replace(regexp,"").length;
trace(text, ": " ,timesOccured );
Use RegExp and .match() like this:
var ch:String = "a"; //Character, that must be checked
var text:String = "This is an example to show how many times '"+ch+"' occured.";
//Matches `ch` characters
var regexp:RegExp = new RegExp(ch,"g");
var matches:Array = text.match(regexp);
var timesOccured:Number = 0;
//`matches` can be 'null', so we are performing additional check
if( matches ){
timesOccured = matches.length;
}
trace(text, ": " ,timesOccured );
Now when you have timesOccured, you could easily do your validation:
if( timesOccured > 6 ){
//Do some stuff
}else{
//Do other stuff
}
Warning: If your ch is a special character for Regular Expression, like a .,+,(,],\,etc..., you need to escape it, before passing it to regexp variable:
ch = ch.replace(new RegExp("[.*+?|()\\[\\]{}\\\\]", "g"), "\\$&");
a simpler alternative to regular expressions can be the following:
var str:String = "This is an example to show how many...";
//find occurrences for character 'a'
trace("Ocurrences:" + str.split('a').length-1);