Nuxt•2w ago

Accessing headers when using $fetch

Is it possible to access the raw response to get the headers using $fetch?

8 Replies

Hi @bnason. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Yes, it is possible to access the raw response to get the headers when using $fetch in Nuxt. You can do this by using the $fetch.raw method. Here's how you can access the headers:

const res = await $fetch.raw('/api/endpoint')
const headers = res.headers

const res = await $fetch.raw('/api/endpoint')
const headers = res.headers

The $fetch.raw method returns the full response object, which includes the headers, status, and other metadata along with the response data. This functionality is mentioned in the Nuxt documentation on Data Fetching:

Nuxt includes the ofetch library, and is auto-imported as the $fetch alias globally across your application.

The ofetch library, which $fetch is based on, provides this capability to access the raw response. It's worth noting that when you use $fetch.raw, you'll need to access the response data using res._data instead of getting it directly from the response. If you're specifically interested in forwarding headers in server-side requests, you might also want to check out the useRequestFetch composable, which automatically forwards request headers in server-side fetch requests. Data Fetching useRequestFetch ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

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bnasonOP•2w ago

@kapa.ai If I pass a function to to parseResponse option, how do I access that data?

kapa.ai•2w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To answer your question about accessing data when using a custom parseResponse function with $fetch or useFetch in Nuxt, I'll need to provide some clarification and context based on the available information in the knowledge sources. The knowledge sources provided don't contain specific information about a parseResponse option for $fetch or useFetch in Nuxt. This option is not a standard feature of Nuxt's built-in fetch utilities as described in the documentation. However, Nuxt's useFetch and $fetch are based on the ofetch library, which might have additional options not explicitly covered in the Nuxt documentation. If you're using a custom parseResponse function, it would typically be used to transform the response before it's returned. Based on the standard behavior of useFetch in Nuxt, you would typically access the data like this:

const { data } = await useFetch('/api/endpoint')
console.log(data.value)

const { data } = await useFetch('/api/endpoint')
console.log(data.value)

If you've used a custom parseResponse function, the data would contain the result of that parsing function. For a more accurate and detailed answer specific to using a parseResponse option, you might need to consult the ofetch library documentation or provide more context about how you're implementing this custom parsing. If you're working with a custom implementation or a different version of Nuxt that includes this feature, please provide more details so I can give you a more accurate answer. Docs > Api > Composables > useFetch ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

<@712351223482810390> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

bnasonOP•2w ago

@kapa.ai no i mean when I use $fetch.raw('...', parseResponse: (value) => ({ foo: 'bar' })) I need to get the value returned from parseResponse. Is that in the response._data key?

kapa.ai•2w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I apologize for the confusion in my previous response. You're correct to ask about the specific behavior when using $fetch.raw with a custom parseResponse function. Let me clarify based on the information available in the knowledge sources. The Nuxt documentation doesn't explicitly cover this specific use case with $fetch.raw and a custom parseResponse function. However, based on the general behavior of $fetch and useFetch in Nuxt, we can infer the following: When using $fetch.raw, the response is typically accessed through the _data property. This is mentioned in the Nuxt documentation on Data Fetching:

const res = await $fetch.raw(url)
return res._data

const res = await $fetch.raw(url)
return res._data

Given this information, it's likely that the result of your custom parseResponse function would indeed be available in the _data property of the response. So, you should be able to access it like this:

const res = await $fetch.raw('...', {
  parseResponse: (value) => ({ foo: 'bar' })
})
const parsedData = res._data
console.log(parsedData) // Should output { foo: 'bar' }

const res = await $fetch.raw('...', {
  parseResponse: (value) => ({ foo: 'bar' })
})
const parsedData = res._data
console.log(parsedData) // Should output { foo: 'bar' }

However, I must emphasize that this is an educated guess based on the available information. The Nuxt documentation doesn't provide explicit details about how custom parseResponse functions interact with $fetch.raw. For the most accurate information, you might want to test this in your Nuxt environment or consult the underlying ofetch library documentation, as Nuxt's $fetch is based on ofetch. Data Fetching ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

<@712351223482810390> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Accessing headers when using $fetch

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