HttpClient

```
public final class HttpClient

                    
```
Low-level executor for a single HTTP request over the platform HttpURLConnection — the sole network transport for every SDK-to-server exchange (attribution, in-app events, conversion data, remote config, purchase validation, OneLink). The SDK deliberately uses HttpURLConnection and not OkHttp, so no third-party networking dependency is pulled in (feature F-013).
A fresh connection is opened and disconnected per call — there is no connection pooling. Application code never touches this class directly: a Task builds a Call through ApiCallFactory, and Call.execute() is what reaches executeRequest.

Constructor Summary

Constructors
Constructor	Description
`HttpClient(Integer requestTimeoutMillis)`

Method Summary

Modifier and Type	Method	Description
`final Response<String>`	`executeRequest(Request request)`	Opens the connection, applies the request's method/headers/timeout/cache/redirect settings, writes the body (if any), reads the response, and returns it on the calling thread.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HttpClient
```
HttpClient(Integer requestTimeoutMillis)
```
    Parameters:
    
    requestTimeoutMillis - default connect/read timeout applied to every request, unless the individual Request overrides it via Request.timeoutMillis.
- Method Detail
  - executeRequest
```
 final Response<String> executeRequest(Request request)
```
    Opens the connection, applies the request's method/headers/timeout/cache/redirect settings, writes the body (if any), reads the response, and returns it on the calling thread. The Content-Type is application/octet-stream for encrypted payloads and application/json otherwise. A 2xx status marks the Response as successful.
    The whole body is wrapped in try/catch (Throwable), not catch (Exception): a java.lang.Error subclass thrown by the underlying stack (e.g. NoClassDefFoundError, OutOfMemoryError) must be caught here and surfaced as an HttpException so it never escapes a background SDK task and crashes the host app — see IC-141. The connection is always disconnected in finally.