Cannot get response header with the same key name (*http.Header)

Question

Let's say I have 2 response headers with the same name "Set-Cookie"

The .Get method can only get the first value

In the document it said: To access multiple values of a key, or to use non-canonical keys, access the map directly.

fmt.Println(headers.Get("Set-Cookie"))
// -> Can only get the first one

However when read the map

for key,value := range headers {
  fmt.Println(key, value)
}
// -> cannot range over headers (type *http.Header)

Currently I'm not sure the right way to read this data.

headers is a slice of strings.

Volker
– Volker

2019-11-05 04:53:06 +00:00
Commented Nov 5, 2019 at 4:53 — Volker
– Volker, Commented Nov 5, 2019 at 4:53

Burak Serdar · Accepted Answer · 2019-11-05 04:53:44Z

2

http.Header is already a map[string][]string so there should be no need to pass the address of it around. If you somehow passed &request.Header, then you should pass it directly instead, without taking the address. If you have to pass the address for some reason, range over *headers instead of headers:

for key,value := range *headers {
}

answered Nov 5, 2019 at 4:53

Burak Serdar

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Comments

hayashi-ay · Accepted Answer · 2020-12-09 14:42:15Z

2

Use Values instead of Get. Values returns all values associated with the given key.

answered Dec 9, 2020 at 14:42

hayashi-ay

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1 Comment

mecampbellsoup Over a year ago

this is the only right answer lol

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