René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"executeAsyc relies on passed request data to be valid after returning?","articleBody":"### Brief overview\r\nFirst of all, apologies if I completely misunderstood this problem, the documentation and online samples are rather thin.\r\n\r\nI am doing a fire-and-forget POST webhook call. I am calling the Postman echo server for testing. When request goes through, Postman reports content length 0 and null json in the response. Sometimes I also get a `Poco::Exception occurred. [scheme=https, host=postman-echo.com] message=[Not a valid integer: 18446744073309551616]` for content length header or a segfault. Due to this weird behaviour, I suspect that executeAsync tries to use some data that has already been deallocated once the method returns from scope.\r\n\r\nIf I add a sleep or `pResponseCb-\u003ewaitForCompletion();` before returning from method everything works as expected.\r\n\r\nCode is almost line by line from async sample, except it is POST instead of GET.\r\n```c++\r\nvoid post(string body) {\r\n   //init client and stuff...\r\n    easyhttpcpp::MediaType::Ptr pMediaType(new easyhttpcpp::MediaType(\"application/json; charset=utf-8\"));\r\n    easyhttpcpp::RequestBody::Ptr pRequestBody = easyhttpcpp::RequestBody::create(pMediaType, body);\r\n\r\n    easyhttpcpp::Request::Builder requestBuilder;\r\n\r\n    easyhttpcpp::Request::Ptr pRequest = requestBuilder.setUrl(\"https://postman-echo.com/post\")\r\n        .httpPost(pRequestBody)\r\n        .build();\r\n    easyhttpcpp::Call::Ptr pCall = pHttpClient-\u003enewCall(pRequest);\r\n\r\n    HttpClientCallback::Ptr pResponseCb = new HttpClientCallback();\r\n\r\n    pCall-\u003eexecuteAsync(pResponseCb);\r\n    //pResponseCb-\u003ewaitForCompletion(); //this makes it work\r\n}\r\n```\r\n### Expected behavior\r\nexecuteAsync should make a copy of all the data it needs before returning?\r\n### Actual behavior\r\nexecuteAsync  seems to rely on the passed data to be valid after returning.\r\n### Steps to reproduce\r\nThe code sample above should be enough.\r\n### Specifications like the version of the project, operating system, or hardware etc.\r\nWindows 10, VS2019, conan package shared build v2.1.0","author":{"url":"https://github.com/cen1","@type":"Person","name":"cen1"},"datePublished":"2020-09-22T21:08:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/19/easyhttpcpp/issues/19"}