Hono•2w ago

Pass context to exception handler

Hey, is there a way to pass some context about request to the exception handler via Hono context?

2 Replies

avem•2w ago

// Example route
app.get('/', async (c) => {
    // ....computing the context...
    const context = {
        extensionID: params.extension_id,
        fingerprint: params.fingerprint,
        plan: account.plan(),
        accountID: account.id(),
        extensionVersion: params.extension_version,
        currentPhoto: account.totalUsage() + 1,
        clerkID: clerkID,
        aiMode: params.ai_mode,
        solveMode: params.solve_mode,
        language: params.language,
        joinedAt: account.createdAt(),
    };
    
    // ...some exception happening..
});

// Custom error handler
app.onError((err, c) => {
    // I want to have access to it in here via "c"
});

// Example route
app.get('/', async (c) => {
    // ....computing the context...
    const context = {
        extensionID: params.extension_id,
        fingerprint: params.fingerprint,
        plan: account.plan(),
        accountID: account.id(),
        extensionVersion: params.extension_version,
        currentPhoto: account.totalUsage() + 1,
        clerkID: clerkID,
        aiMode: params.ai_mode,
        solveMode: params.solve_mode,
        language: params.language,
        joinedAt: account.createdAt(),
    };
    
    // ...some exception happening..
});

// Custom error handler
app.onError((err, c) => {
    // I want to have access to it in here via "c"
});

I guess the only way of doing it is to wrap exception and add context? I would like to avoid that since, some of the libraries I use throw exceptions in uncaught promises, which don't allow me to catch them in handler try/catch block.

Aditya Mathur•2w ago

You can pass this data in the Exception as well as set this in context using .set and access it in the onError using .get

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Pass context to exception handler