I did look at the examples, but the Preemptive Basic Auth one<https://github.com/apache/httpcomponents-client/blob/master/httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientPreemptiveBasicAuthentication.java> requires to manually create and configure a context and pass it to the HttpClient.execute() method every time. Apart from that not being very convenient, it wouldn’t work with RestTemplate, as it uses HttpClient as its underlying client and you don’t call the HttpClient.execute() directly.
Giovanni From: Oleg Kalnichevski <ol...@apache.org> Date: Thursday, 13 July 2023 at 17:03 To: HttpClient User Discussion <httpclient-users@hc.apache.org> Subject: Re: Preemptive Basic auth with Apache HttpClient 5.2 On Thu, 2023-07-13 at 15:27 +0000, D'Ascola, Giovanni wrote: > Is there a way to implement preemptive basic authentication with > Apache HttpClient 5.2 using a HttpRequestInterceptor similar to how > it's done here (accepted > response)<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstackoverflow.com%2Fquestions%2F2014700%2Fpreemptive-basi&data=05%7C01%7Cgiovanni.d%27ascola%40fisglobal.com%7Cdacd543154b24a5b9f1b08db83baaa96%7Ce3ff91d834c84b15a0b418910a6ac575%7C0%7C0%7C638248609963849079%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Ae7mu%2F%2BJju8PJ4nS8XEe3UDQ2wtgRlNykW2PIEmgZyA%3D&reserved=0 > c-authentication-with-apache-httpclient-4> for Apache HttpClient 4? > > > > We use Apache HttpClient both directly and as the RestTemplate > underlying Http client. Preemptive auth used to work with HttpClient > 4 using HttpRequestInterceptor (see the accepted response for the > question I linked above), but we can't reuse the same code as the > AuthScheme class is now gone. > > > > I tried a few of things but neither worked (see below). Have you looked at: https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhc.apache.org%2Fhttpcomponents-client-5.2.x%2Fexamples.html&data=05%7C01%7Cgiovanni.d%27ascola%40fisglobal.com%7Cdacd543154b24a5b9f1b08db83baaa96%7Ce3ff91d834c84b15a0b418910a6ac575%7C0%7C0%7C638248609963849079%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ig%2BnOrP03Ssz8EzQmkrlNJ1NadZeermgC47MAOvNHUM%3D&reserved=0<https://hc.apache.org/httpcomponents-client-5.2.x/examples.html> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fapache%2Fhttpcomponents-client%2Fblob%2Fmaster%2Fhttpclient5%2Fsrc%2Ftest%2Fjava%2Forg%2Fapache%2Fhc%2Fclient5%2Fhttp%2Fexamples%2FClientPreemptiveBasicAuthentication.java&data=05%7C01%7Cgiovanni.d%27ascola%40fisglobal.com%7Cdacd543154b24a5b9f1b08db83baaa96%7Ce3ff91d834c84b15a0b418910a6ac575%7C0%7C0%7C638248609963849079%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=BldG8xlzS8AwYT5fvtCdZVodHBEnVU7f3kHGEEsowQU%3D&reserved=0<https://github.com/apache/httpcomponents-client/blob/master/httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientPreemptiveBasicAuthentication.java> ? 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