Cleaning up and testing more scenarios for upload proxy behavior.

This test suite seems to reveal Traffic Server 9.1 behaving in an
unexpected way, when requests are canceled before the request body has
been fully sent, but just trying to test and document current behavior
before further upgrades.

Author: GUI

templates/etc/test-env/nginx/apis.conf.etlua

@@ -172,6 +172,7 @@ server {
 
       local digest = sha256:final()
 
+      ngx.status = ngx.var.http_x_expected_status or 200
       ngx.header["Content-Type"] = "application/json"
       ngx.print(cjson.encode({
         method = ngx.var.request_method,
@@ -204,6 +205,7 @@ server {
       sha256:update(data)
       local digest = sha256:final()
 
+      ngx.status = ngx.var.http_x_expected_status or 200
       ngx.header["Content-Type"] = "application/json"
       local response = cjson.encode({
         method = ngx.var.request_method,
@@ -215,7 +217,24 @@ server {
     }
   }
 
-  location = /unread-body {
+  location = /unread-body-200 {
+    default_type application/json;
+    return 200 "{\"method\":\"$request_method\",\"http_content_length\":\"$http_content_length\"}";
+  }
+
+  location = /unread-body-422 {
+    default_type application/json;
+    return 422 "{\"method\":\"$request_method\",\"http_content_length\":\"$http_content_length\"}";
+  }
+
+  location = /unread-body-500 {
+    default_type application/json;
+    return 500 "{\"method\":\"$request_method\",\"http_content_length\":\"$http_content_length\"}";
+  }
+
+  location = /max-body-size {
+    client_max_body_size 1m;
+    client_body_buffer_size 1m;
     return 200 "{\"method\":\"$request_method\",\"http_content_length\":\"$http_content_length\"}";
   }