I'm using RSS Graffitty to post RSS items to a facebook page.
The app told me the items were missing the publication date so I added this tag:
echo "<pubdate>".$row['Date']."</pubdate>";
$row['Date'] is obtained from my MySQL database and it's a Datetime column.
How must I format it/echo it so it's recognized by the RSS feed? Must I change the element?
Thanks
RSS 2.0 specifications on the <pubDate> element should conform to the RFC 822 Date and Time syntax. Namely, to display it in the following format:
Fri, 21 Dec 2012 10:00:01 GMT
If you error run your RSS feed through the W3C Feed Validator you'll note these examples of valid RFC822 date-times:
<pubDate>Wed, 02 Oct 2002 08:00:00 EST</pubDate>
<pubDate>Wed, 02 Oct 2002 13:00:00 GMT</pubDate>
<pubDate>Wed, 02 Oct 2002 15:00:00 +0200</pubDate>
If you wanted to use MySQL formatting, you'd call the column with the following use of date_format(), adjusting the UTC modifier/marker as necessary:
date_format(Date, '%a, %d %b %Y %H:%i:%s')
Or you can do it via the PHP date method with DATE_RSS setting the format for you:
echo "<pubdate>".date(DATE_RSS, strtotime($row['Date']))."</pubdate>";
Make sure your <pubDate> element appear within its parent <item> node.
Also note that this element is case-sensitive. You must output pubDate with the capital D and not all lowercase (pubdate) as other elements can.
Just a hint: the -r switch in the php date function is the shorthand for the RFC 2822 format, which actually does yield a four digit year.
See PHP Doc for reference.
Related
I want to implement a piece of code that converts a datetime object like ~U[2022-06-07 18:37:16.842920Z] to a format like Tue, 7 Jun 2022 18:37:16 GMT. I do not want to use the Calendar.DateTime.Format.httpdate since our codebase already uses DateTime.
I need it to send in API headers with RFC2616 format. Any help is appreciated.
Elixir 1.11.0 introduced Calendar.strftime/3 that is what you need. Please note that DateTime and Calendar are different built-in modules that serve different purposes. There should be no problem in using them combined.
~U[2022-06-07 18:37:16.842920Z]
|> DateTime.shift_zone!("Etc/UTC")
|> Calendar.strftime("%a, %-d %b %Y %X GMT")
# => "Tue, 7 Jun 2022 18:37:16 GMT"
The following code
fmt.Println(time.Now().Format("2 Jan 2006 03:04:05PM MST"))
prints
26 Nov 2021 04:00:31PM GMT
How to format the timezone as Europe/London i.e. in the IANA format? The expected output is
26 Nov 2021 04:00:31PM Europe/London
There isn't an option to do this directly with the time format layout.
However Location.String will print the IANA name in most cases.
String returns a descriptive name for the time zone information, corresponding to the name argument to LoadLocation or FixedZone.
And LoadLocation usually takes the IANA string as input:
If the name is "" or "UTC", LoadLocation returns UTC. If the name is "Local", LoadLocation returns Local.
Otherwise, the name is taken to be a location name corresponding to a file in the IANA Time Zone database, such as "America/New_York".
Now "Local" isn't a valid IANA name, but "UTC" is — well, actually UTC is an alias of Etc/UTC.
The other gotcha with the std time package is that Location.String will print the name passed to FixedZone, and that can be literally anything.
So, if you are able to make assumptions about how your time.Location are instantiated, the following might be a viable solution:
fmt.Printf("%s %s", t.Format("2 Jan 2006 03:04:05PM"), t.Location())
Otherwise you will have to use some third-party package, or roll out your own mapping.
I need to convert a string containing a valid UTC time to an Ecto.DateTime one, which I will insert it into my database with the correct format later. I have tried using the Ecto.DateTime.cast(date) method but it doesn't seem to work. The string is Sat Aug 04 11:48:27 +0000 2012 and comes from the Twitter API.
I know there are libraries such as Timex which I didn't inspect yet. Is there any easy working solution already built in Elixir?
There's no built-in solution in Elixir or Erlang for parsing DateTime values of this format:
Sat Aug 04 11:48:27 +0000 2012
You can certainly write a parser yourself, but it's neither going to be short or simple. You'll have to split the string, get the values of both date and time parameters, convert month strings to month integers, parse the timezone, represent the complete value in Elixir/Erlang DateTime formats and then finally cast it to Ecto.DateTime. See the following links:
Elixir Tips - Date Parsing
Erlang - How Can I Parse RFC1123 Dates Into An Erlang Term?
Convert timestamp to datetime in erlang
Using Timex is the best option here.
It's a well written library that allows you to stay away from the chaos of inner workings of Date/Time. With Timex, you can parse your string like this:
"Sat Aug 04 11:48:27 +0000 2012"
|> Timex.parse!("%a %b %d %T %z %Y", :strftime)
|> Ecto.DateTime.cast!
# => #Ecto.DateTime<2012-08-04 11:48:27>
Note: Timex has built-in support for a lot of the common DateTime formats, and I found it weird that a DateTime format being sent by Twitter wasn't supported - so I wrote one for you. Maybe double check to see if your string is correct? Also take a look at Timex Parsing and Formatting documentation.
I'm trying to make the bootstrap datepicker display the date in UTC instead of in the browser timezone (as it does by default). I read in the docs that I can specify toDisplay and toValue functions and make them customize how the display is done. As I was implementing the toDisplay function, I first set the date in the element like this:
divElement.datepicker('update', new Date(1420066800000));
Then I was debugging toDisplay() and the first step was to check the value of the first parameter of the toDisplay() function, which is a date object, and make sure it has the same value I supplied when setting the date using 'update', but I noticed that it's different and so my question is why is that so?
The value I supplied when using 'update' is 1420066800000 which is printed as "Thu Jan 01 2015 00:00:00 GMT+0100 (CET)" and the value of the date parameter of toDisplay() is printed as "Thu Jan 01 2015 01:00:00 GMT+0100 (CET)".
Thanks.
I have a client side JavaScript that generates a date in JavaScript( new Date(2007,5,1)).
I need this date passed through to a hidden field that the code behind can access.
My issue is that when the hidden field is converted into a DotNet datetime, the time is incorrect. This is because the JavaScript is including timezone info from the client browser.
DotNet is then using this info to recalculate the time based on the difference between the server time and the client time.
What i need from the JavaScript is just the year, month and day.
I don't want to pass through 3 int values to my code behind as this will be a major change to the whole app.
What is the best way for me to accomplish this?
If i can set a UTC time with no timezone info I think that might work.
Any help is appreciated.
demo
If I understood it correctly,
you need .toDateString()
var date = new Date(2007,5,1);
document.write(date);
document.write("<br><br>versus<br><br>");
document.write(date.toDateString());
prints
Fri Jun 01 2007 00:00:00 GMT+0800 (Taipei Standard Time)
versus
Fri Jun 01 2007
You can use DateTimeOffset.ParseExact to parse a string to a DateTimeOffset value using the format you specify:
string dateString = "Fri Jun 01 2007 00:00:00 GMT+08:00";
DateTimeOffset date = DateTimeOffset.ParseExact(dateString, "ddd MMM dd yyyy hh:mm:ss 'GMT'zzz", CultureInfo.InvariantCulture);
You have to put GMT in quotes otherwise M will be interpreted as a format character.
Unfortunatelly, it is not possible to ignore part of the string value. If your string includes the name of the timezone you have to split it first and get the part without the description
string dateString = "Fri Jun 01 2007 00:00:00 GMT+08:00 (Taipei Standard Time)";
var parts=dateString.Split('(');
string datePart = parts[0].TrimEnd();
var date=DateTimeOffset.ParseExact(datePart,"ddd MMM dd yyyy hh:mm:ss 'GMT'zzz",CultureInfo.InvariantCulture);
You can build up a string from the javascript Date object you have created - it has getDate(), getMonth() and getFullYear() methods that you can use to build up the exact string you want in the hidden field.
I would recommend to use a format specification in C# when you get the values in the code behind file. Let me explain what I mean -
The date time format for the Date(...) in JavaScript is as follows
"Tue Jun 1 11:12:15 UTC+0530 2010"
which in C# would translate to the following format string -
"ddd MMM d hh:mm:ss UTCzzz yyyy"
with this format string use the DateTime.ParseExact(string <Hidden Field Value>, format, provider) to get the correct value for the datetime in C#.
Use provider as System.Globalization.CultureInfo.InvariantCulture.