how to use RFC1123 date in http header?

[oak flare]

hey guys. can smb explain to me how to use DateTimeFormatter RFC_1123_DATE_TIME? Im making a request to the api and i need to have Date header with its value being in RFC1123 format. can smb help me out? i dont understand what to write here:

HttpHeaders headers = new HttpHeaders();
headers.set();

thanks in advance.

[vast rose]

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[south orbit]

I mean, it depends on what client API you're using.
In the most general case, there's nothing special, that's like if you wanted to set a numeric header you'd first convert your value to String then set the header to that String. It's the same principle with a date.

[weak abyss]

Use ZonedDateTime to get the current date and time. ZonedDateTime is preferred as it includes the time zone information which is important for the RFC-1123 format.

import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import org.springframework.http.HttpHeaders;

public class Example {
    public static void main(String[] args) {
        // Step 1: Get the current date and time
        ZonedDateTime now = ZonedDateTime.now();
        
        // Step 2: Format the date and time using RFC_1123_DATE_TIME
        String formattedDate = now.format(DateTimeFormatter.RFC_1123_DATE_TIME);
        
        // Step 3: Create HttpHeaders and set the Date header
        HttpHeaders headers = new HttpHeaders();
        headers.set("Date", formattedDate);
        
        // Example output
        System.out.println("Formatted Date: " + formattedDate);
        System.out.println("Headers: " + headers);
    }
}

[south orbit]

If they use spring's HttpHeaders, then they can simply do headers.setDate(now);
It knows to take in a ZonedDateTime and it will format it with RFC_1123_DATE_TIME

[oak flare]

oh wow. i can do it in such simple way?

but will it add GMT letters at the end? bc in postman i set my date to Mon, 27 May 2024 12:55:00 GMT, so i need the same for my app

[south orbit]

Well, it depends on whether you'll use spring's internal API for http client.

If you want it to use GMT, you should force the ZonedDateTime to be on GMT. Let me check an example

[oak flare]

i use this stuff:

ResponseEntity<String> response = restTemplate.exchange(checkUrl, HttpMethod.GET, entity, String.class);

yep, its Spring functionality

[weak abyss]

yes, but you will not have the added hours:

and with formatted you will have:

[oak flare]

ah, i need the first version

[oak flare]

but i see that you arent using formattedDate var anywhere for headers. only for sout

so i can ditch it, right?

and i can just use this

[weak abyss]

yes

But it will show London time zone

where GMT starts

[oak flare]

what do u mean?

[weak abyss]

If you are in some another time zone you ill not see added hours

[oak flare]

im gmt +3

crap

[weak abyss]

me too

[oak flare]

so whats the solution then?

ah wait

ok. i see

[weak abyss]

You just need GMT at the end?

but with added hours?

You can edit the formatted string and just add it manually

[oak flare]

nope. as i understand i dont need added hours, but i need GMT letters appended. for example now its 10:54 on my computer. but if i want to make a request with postman, i need to have this:

[weak abyss]

I edited like this:

[oak flare]

but u have +0300 before GMT letters. i dont need that

[weak abyss]

I see

[oak flare]

i just need to have current GMT time and add GMT letters to the time

and thats where im stuck

[weak abyss]

Still you can edit the string yourself and find the +0300 and cut it

and create new string

simple school level string operations

but hours will be added

at your time zone

[oak flare]

but wait. i see that this is what i need

and i dont need any string operations

[weak abyss]

Yes. But I tell you again... - it will give you London time

[oak flare]

but thats what i need. i just told you

[weak abyss]

There:

[oak flare]

ffs

nvm

[weak abyss]

I achieved with added hours to my Lithuanian time.

[oak flare]

i sorted it out

man reik GMT laiko, nereik man prisidet triju valandu 😄

[weak abyss]

Ok. Just I wanted myself exactly my time. I insisted on this.

Supratau

Aš pasidariau kaip aš noriu.

[oak flare]

viskas ok. aciu uz pagalba 💪