mirror of
https://github.com/yhirose/cpp-httplib.git
synced 2026-04-12 11:48:30 +00:00
56 lines
1.5 KiB
Markdown
56 lines
1.5 KiB
Markdown
---
|
|
title: "C03. Set Default Headers"
|
|
order: 3
|
|
status: "draft"
|
|
---
|
|
|
|
When you want the same headers on every request, use `set_default_headers()`. Once set, they're attached automatically to every request sent from that client.
|
|
|
|
## Basic usage
|
|
|
|
```cpp
|
|
httplib::Client cli("https://api.example.com");
|
|
|
|
cli.set_default_headers({
|
|
{"Accept", "application/json"},
|
|
{"User-Agent", "my-app/1.0"},
|
|
});
|
|
|
|
auto res = cli.Get("/users");
|
|
```
|
|
|
|
Register the headers you need on every API call — like `Accept` or `User-Agent` — in one place. No need to repeat them on each request.
|
|
|
|
## Send a Bearer token on every request
|
|
|
|
```cpp
|
|
httplib::Client cli("https://api.example.com");
|
|
|
|
cli.set_default_headers({
|
|
{"Authorization", "Bearer " + token},
|
|
{"Accept", "application/json"},
|
|
});
|
|
|
|
auto res1 = cli.Get("/me");
|
|
auto res2 = cli.Get("/projects");
|
|
```
|
|
|
|
Set the auth token once, and every subsequent request carries it. Handy when you're writing an API client that hits multiple endpoints.
|
|
|
|
> **Note:** `set_default_headers()` **replaces** the existing default headers. Even if you only want to add one, pass the full set again.
|
|
|
|
## Combine with per-request headers
|
|
|
|
You can still pass extra headers on individual requests, even with defaults set.
|
|
|
|
```cpp
|
|
httplib::Headers headers = {
|
|
{"X-Request-ID", "abc-123"},
|
|
};
|
|
auto res = cli.Get("/users", headers);
|
|
```
|
|
|
|
Per-request headers are **added** on top of the defaults. Both are sent to the server.
|
|
|
|
> For details on Bearer token auth, see [C06. Call an API with a Bearer token](c06-bearer-token).
|