Move to postman-echo.com from httpbin.org (#442)

Co-authored-by: Dengke Tang <dengket@amazon.com>

Author: waahm7

integration-testing/http_client_test.py

@@ -82,12 +82,12 @@ def test_simple_get_google(self):
         run_command(simple_get_args)
     def test_simple_get_h1(self):
         """make a simple GET request via HTTP/1.1 and make sure it succeeds"""
-        simple_get_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http1_1', 'http://httpbin.org/get']
+        simple_get_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http1_1', 'http://postman-echo.com/get']
         run_command(simple_get_args)
 
     def test_simple_post_h1(self):
         """make a simple POST request via HTTP/1.1 to make sure sending data succeeds"""
-        simple_post_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http1_1', '-P', '-H', 'content-type: application/json', '-i', '-d', '\"{\'test\':\'testval\'}\"', 'http://httpbin.org/post']
+        simple_post_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http1_1', '-P', '-H', 'content-type: application/json', '-i', '-d', '\"{\'test\':\'testval\'}\"', 'http://postman-echo.com/post']
         run_command(simple_post_args)
 
     def test_simple_download_h1(self):
@@ -100,12 +100,12 @@ def test_simple_download_h1(self):
 
     def test_simple_get_h2(self):
         """make a simple GET request via HTTP2 and make sure it succeeds"""
-        simple_get_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http2', 'https://httpbin.org/get']
+        simple_get_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http2', 'https://postman-echo.com/get']
         run_command(simple_get_args)
 
     def test_simple_post_h2(self):
         """make a simple POST request via HTTP2 to make sure sending data succeeds"""
-        simple_post_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http2', '-P', '-H', 'content-type: application/json', '-i', '-d', '\"{\'test\':\'testval\'}\"', 'https://httpbin.org/post']
+        simple_post_args = elasticurl_cmd_prefix + ['-v', 'TRACE', '--http2', '-P', '-H', 'content-type: application/json', '-i', '-d', '\"{\'test\':\'testval\'}\"', 'https://postman-echo.com/post']
         run_command(simple_post_args)
 
     def test_simple_download_h2(self):

tests/test_connection_manager.c

@@ -1378,7 +1378,7 @@ static struct aws_byte_cursor s_get_proxy_host_for_test(
     bool h2) {
     struct aws_string *host_string;
     if (h2) {
-        host_string = configs->https_proxy_host_h2;
+        host_string = configs->https_proxy_host;
     } else if (auth_type == AWS_HPAT_BASIC) {
         host_string = configs->http_proxy_basic_host;
     } else if (proxy_test_type == TUNNELING_DOUBLE_TLS) {

tests/test_stream_manager.c

@@ -1229,7 +1229,7 @@ TEST_CASE(h2_sm_acquire_stream_multiple_connections) {
 TEST_CASE(h2_sm_close_connection_on_server_error) {
     (void)ctx;
     /* server that will return 500 status code all the time. */
-    struct aws_byte_cursor uri_cursor = aws_byte_cursor_from_c_str("https://httpbin.org/status/500");
+    struct aws_byte_cursor uri_cursor = aws_byte_cursor_from_c_str("https://postman-echo.com/status/500");
     struct sm_tester_options options = {
         .max_connections = 1,
         .max_concurrent_streams_per_connection = 10,