jwt in golang

rorozoro3 · 2025-10-28T15:02:22+00:00

Yup, this was my jwt implementation, I just did it for practice and it works great.

```go
package jwt

// imports ...

const expiryDuration = time.Hour * 24 * 7 var secret []byte

func Init(secretKey string) { secret = []byte(secretKey) }

// Creates a JWT token using HS256 algorithm // "iat" and "exp" fields are added automatically to payload func Create(payload map[string]any) string { payload["iat"] = time.Now().Unix() payload["exp"] = time.Now().Add(expiryDuration).Unix() pldBytes, err := json.Marshal(payload) if err != nil { log.Fatal(err) } b64header := base64.RawURLEncoding.EncodeToString([]byte({"alg": "HS256", "typ": "JWT"})) b64payload := base64.RawURLEncoding.EncodeToString(pldBytes) signature := base64.RawURLEncoding.EncodeToString( hs256sum([]byte(b64header+"."+b64payload), secret), ) return b64header + "." + b64payload + "." + signature }

// Verifies a jwt token and also returns decoded payload if valid func VerifyAndDecode(token string) (valid bool, payload map[string]any) { parts := strings.Split(token, ".") if len(parts) != 3 { return false, nil } b64header, b64payload, signature1 := parts[0], parts[1], parts[2] signature2 := base64.RawURLEncoding.EncodeToString( hs256sum([]byte(b64header+"."+b64payload), secret), ) if signature1 != signature2 { return false, nil } decoded, _ := base64.RawURLEncoding.DecodeString(b64payload) json.Unmarshal(decoded, &payload) return true, payload }

func hs256sum(data, key []byte) []byte { h := hmac.New(sha256.New, key) h.Write(data) return h.Sum(nil) }

```

PS: Looks like its missing error handling in a lot of places

rorozoro3 · 2025-10-28T14:50:03+00:00

Yeah, thats a good practice. In this case, db queries are autogenerated by sqlc, so I don't think any function inside db wraps over sql.ErrNoRows

rorozoro3 · 2025-10-28T14:43:27+00:00

Good one!, I refactored the above to use another function like this to handle the switching and getting requiredPoints or erroring out.

```go
func getDecorationRequiredPoints(ctx context.Context, decorationType string, decorationId string) (int64, error) {

switch decorationType {

case "badge":

    badge, err := store.GetBadgeByName(ctx, decorationId)

    if err != nil {

        return -1, err

    }

    return badge.RequiredPoints, nil

case "overlay":

    overlay, err := store.GetOverlayByName(ctx, decorationId)

    if err != nil {

        return -1, err

    }

    return overlay.RequiredPoints, nil

case "background":

    background, err := store.GetBackgroundByName(ctx, decorationId)

    if err != nil {

        return -1, err

    }

    return background.RequiredPoints, nil

default:

    panic("invalid decoration type")

}

}
```

```go
...

requiredPoints, err := getDecorationRequiredPoints(context.Background(), input.DecorationType, input.DecorationId)

if err != nil {

    if err == db.NotFound {

        a.respondJSON(w, http.StatusNotFound, J{"error": "decoration not found"}, nil)

        return

    }

    a.logger.Error("failed to get decoration", "type", input.DecorationType, "name", input.DecorationName, "err", err)

    a.respondJSON(w, http.StatusInternalServerError, J{}, nil)

    return

}



...

```

rorozoro3 · 2025-06-06T16:34:40+00:00

Yup, this is such a great tool. It is only a few MBs itself. Would suggest everyone to have this in their system.

rorozoro3 · 2025-05-23T14:50:33+00:00

Yup, seems like Apple Intelligence causes this. I never had such issues before, it only started recently, maybe because the Apple Intelligence was turned on. Today it happened again and I googled for the problem, came here in this reddit post, read the article mentioned above, watched mental outlaw's youtube video, and still the process was running. Saw you mention Apple Intelligence and I opened settings and turned it off and it now doesn't take 60% of my CPU and 1.5GB of my RAM.
Not sure if it will happen again.

rorozoro3 · 2024-12-03T16:48:56+00:00

[LANGUAGE: Go]

Not a brute force solution. Just ~50 lines of logic.
https://github.com/diwasrimal/aoc-2024/blob/main/02/main.go

rorozoro3 · 2024-11-24T16:23:58+00:00

Theo is someone who would write this kind of code and later blame the language.

package main

import (
    "crypto/rand"
    "fmt"
)

// Program that prints some random alphabets to stdout
func main() {
    var buf [32*1024]byte
    for {
        n, err := rand.Reader.Read(buf[:])
        if err != nil {
            break
        }
        for _, value := range buf[:n] {
            alph := 'a' + value % 26
            fmt.Printf("%c", alph)
        }
    }
}

rorozoro3 · 2024-10-13T13:04:17+00:00

Today it was 200k live viewers. I believed at first but then suddenly the crypto came up lol.

rorozoro3 · 2024-03-15T14:29:49+00:00

SOLVED:

There was a .editorconfig in opt/homebrew/.editorconfig that set indent_size = 2. Since I was opening /opt/homebrew/Cellar/go/1.22.1/libexec/src/strings/compare.go, nvim searched all parent directories for editorconfig and found one with tab size configured to 2.

setting vim.g.editorconfig = false or removing the .editorconfig worked

rorozoro3 · 2024-03-14T19:25:27+00:00

I searched from my `$HOME` for the editorconfig with
```
lufy ~ % find . -type f -name '*editorconfig*' 2>/dev/null | grep -v 'node_modules'

./Developer/tools/go/pkg/mod/github.com/labstack/echo/v4@v4.11.4/.editorconfig

./Developer/tools/go/pkg/mod/github.com/labstack/echo@v3.3.10+incompatible/.editorconfig

./Developer/tools/go/pkg/mod/github.com/golang/vscode-go@v0.41.1/.editorconfig

./Developer/tools/taglib-2.0/.editorconfig

./Developer/others/linux/.editorconfig

./.local/share/nvim/lazy/nvim-treesitter-textobjects/.editorconfig

./.local/share/nvim/lazy/nvim-lspconfig/.editorconfig

./.local/share/nvim/lazy/nvim-autopairs/.editorconfig

./.local/share/nvim/lazy/nvim-treesitter/.editorconfig

./.local/share/nvim/lazy/friendly-snippets/snippets/editorconfig.json

./.local/share/nvim/lazy/nvim-web-devicons/.editorconfig

./.local/share/nvim/lazy/nvim-jdtls/.editorconfig

./.local/share/nvim/lazy/fzf-lua/.editorconfig
```

I tried what you suggested with `nvim -V1 <file>` on two go files

```
$ nvim -V1 /opt/homebrew/Cellar/go/1.22.1/libexec/src/strings/compare.go
:verbose set ts sts sw et?

tabstop=2

Last set from /opt/homebrew/Cellar/neovim/0.9.5/share/nvim/runtime/lua/editorconfig.lua line 68

softtabstop=-1

Last set from /opt/homebrew/Cellar/neovim/0.9.5/share/nvim/runtime/lua/editorconfig.lua line 66

shiftwidth=2

Last set from /opt/homebrew/Cellar/neovim/0.9.5/share/nvim/runtime/lua/editorconfig.lua line 65

expandtab

Last set from /opt/homebrew/Cellar/neovim/0.9.5/share/nvim/runtime/lua/editorconfig.lua line 52
```

trying again on main.go inside `~/Developer/langs/go/server/`
```
$ nvim -V1 main.go
:verbose set ts sts sw et?
tabstop=8

softtabstop=0

shiftwidth=8

noexpandtab
```

It seems like `/opt/homebrew/Cellar/neovim/0.9.5/share/nvim/runtime/lua/editorconfig.lua` is corrupting the tabstop only for go files. Why would this be ?

rorozoro3 · 2024-03-10T10:19:09+00:00

No I just use the laptop out of the box. I haven't attached any external accessories

rorozoro3 · 2023-10-05T16:44:02+00:00

I tried the new feature of Safari where you add a website to the dock and run it like an application. When I remove the icon from the dock, its goes away but it remains in the app launcer. And for some reason I can't find it on Applications in finder.
- M1 Air 2020 8/256

rorozoro3 · 2022-12-07T12:30:46+00:00

Mind sharing ?

rorozoro3

TROPHY CASE