API Proxy Client Route Usage Guide

Overview

Apinizer’s Client Route feature enables more flexible and dynamic routing of incoming requests in the API Gateway. With this feature:

Multiple relative paths can be defined for a proxy
Routing can be done to different proxies based on host information
Routing rules can be created based on HTTP header values
Method-based routing can be performed

Before this feature was developed, only a single unique relative path could be defined for each proxy. With the new feature, multiple proxies with the same relative path can be created, and dynamic routing can be performed between them based on host, header, or method information.

How Does Client Route Work?

The Client Route feature evaluates incoming requests according to a specific priority order and routes them to the correct proxy.

Routing Priority Order

The Gateway evaluates incoming requests according to the following priority order:

Relative Path (Highest priority)
Hosts
Headers
Methods (Lowest priority)

Matching Logic

Hosts: When multiple hosts are defined, it works with OR logic. That is, matching any one of the defined hosts is sufficient.
Headers: When multiple headers are defined, it works with AND logic. That is, all defined headers must match.

Wildcard Hostname Usage

Apinizer supports wildcard (joker character) usage to provide flexibility in host definitions. Wildcard hostnames allow all Host header values that match a certain pattern to satisfy the condition and thus match the related Route.

Wildcard Rules

Wildcard hostnames must comply with the following rules:

Can contain only one asterisk (*) in the leftmost or rightmost label of the domain
Asterisk can be used at the beginning or end of the domain

Wildcard Examples

Left-Side Wildcard

*.example.com

This definition enables matching of the following Host values:

a.example.com
x.y.example.com
api.example.com
test.subdomain.example.com

Right-Side Wildcard

example.*

This definition enables matching of the following Host values:

example.com
example.org
example.net
example.io

## Example Scenario

The table below shows 5 different proxies and the Client Route configurations defined for them.

| Proxy ID | Relative Path       | Methods | Hosts (OR)                     | Headers (AND)             |
| -------- | ------------------- | ------- | -------------------------------- | ------------------------ |
| 1        | /jokes              | \-      | \-                               | testmode:true, test:true |
| 2        | /jokes              | \-      | hostname\_x.com, hostname\_y.com | \-                       |
| 3        | /jokes1/endpoint\_x | \-      | \-                               | \-                       |
| 4        | /jokes1             | \-      | \-                               | \-                       |
| 5        | /jokes              | \-      | \-                               | \-                       |

### Routing Examples

According to this configuration, incoming requests are routed as follows:

#### Example 1: Basic Routing

**Request:**

```text
GET https://<ACCESS_URL>/jokes

Result: Routed to Proxy 5 (default proxy since no condition is met)

Example 2: Host-Based Routing

Request:

GET https://<ACCESS_URL>/jokes
Host: hostname_x.com

Result: Routed to Proxy 2 (host condition met)

Example 3: Routing with Missing Header

Request:

GET https://<ACCESS_URL>/jokes
testmode: true

Result: Routed to Proxy 5 (Proxy 1 requires both headers, only one is provided)

Example 4: Full Header Match

Request:

GET https://<ACCESS_URL>/jokes
testmode: true
test: true

Result: Routed to Proxy 1 (all header conditions met)

Example 5: Path Priority - Basic Path

Request:

GET https://<ACCESS_URL>/jokes1

Result: Routed to Proxy 4 (exact path match)

Example 6: Path Priority - Long Path

Request:

GET https://<ACCESS_URL>/jokes1/endpoint_x

Result: Routed to Proxy 3 (more specific path takes priority)

Example 7: Path with Sub-Path

Request:

GET https://<ACCESS_URL>/jokes1/endpoint_x/endpoint_y

Result: Routed to Proxy 3 (closest parent path match)

Example 8: Path Match - Different Sub-Path

Request:

GET https://<ACCESS_URL>/jokes1/endpoint_y

Result: Routed to Proxy 4 (matched /jokes1 as parent path)

Example 9: Host and Header Combination

Request:

GET https://<ACCESS_URL>/jokes
Host: hostname_x.com
testmode: true
test: true

Result: Routed to Proxy 2 (host has higher priority than header)

Important Notes

Path Matching

Relative path matching has the highest priority.
More specific (longer) paths are evaluated before more general (shorter) paths.
If an exact match is not found, the closest parent path is used.

Host Matching

Multiple hosts can be defined.
Hosts work with OR logic.
If the host value in the request matches any of the defined hosts, the condition is met.

Header Matching

Multiple headers can be defined.
Headers work with AND logic.
All headers defined in the request must be present.
In case of missing or incorrect headers, it moves to the next suitable proxy.

Method Matching

Method checking has the lowest priority.
If not specified, all HTTP methods are accepted.

The Client Route feature allows you to easily manage complex routing scenarios in your API Gateway. By understanding the priority order and matching logic correctly, you can create flexible and powerful API routing configurations.

Routing Combination Table

None → Not present in the API proxy definition. What the client sends is not checked. Matched → Present in the API proxy definition. What the client sends is checked, and it sent the expected value. Not Matched → Present in the API proxy definition. What the client sends is checked, but it did not send the expected value. This table shows from the API Proxy perspective how the API Proxy is selected.

#	HOST	PATH	METHOD	HEADER	RESULT	EXPLANATION
1	None	None	None	None	✓ SELECTED	No criteria defined
2	None	None	None	Matched	✓ SELECTED	All defined criteria OK (HEADER)
3	None	None	None	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
4	None	None	Matched	None	✓ SELECTED	All defined criteria OK (METHOD)
5	None	None	Matched	Matched	✓ SELECTED	All defined criteria OK (METHOD, HEADER)
6	None	None	Matched	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
7	None	None	Not Matched	None	✗ REJECTED	Cannot route because METHOD did not match
8	None	None	Not Matched	Matched	✗ REJECTED	Cannot route because METHOD did not match
9	None	None	Not Matched	Not Matched	✗ REJECTED	Cannot route because METHOD, HEADER did not match
10	None	Matched	None	None	✓ SELECTED	All defined criteria OK (PATH)
11	None	Matched	None	Matched	✓ SELECTED	All defined criteria OK (PATH, HEADER)
12	None	Matched	None	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
13	None	Matched	Matched	None	✓ SELECTED	All defined criteria OK (PATH, METHOD)
14	None	Matched	Matched	Matched	✓ SELECTED	All defined criteria OK (PATH, METHOD, HEADER)
15	None	Matched	Matched	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
16	None	Matched	Not Matched	None	✗ REJECTED	Cannot route because METHOD did not match
17	None	Matched	Not Matched	Matched	✗ REJECTED	Cannot route because METHOD did not match
18	None	Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because METHOD, HEADER did not match
19	None	Not Matched	None	None	✗ REJECTED	Cannot route because PATH did not match
20	None	Not Matched	None	Matched	✗ REJECTED	Cannot route because PATH did not match
21	None	Not Matched	None	Not Matched	✗ REJECTED	Cannot route because PATH, HEADER did not match
22	None	Not Matched	Matched	None	✗ REJECTED	Cannot route because PATH did not match
23	None	Not Matched	Matched	Matched	✗ REJECTED	Cannot route because PATH did not match
24	None	Not Matched	Matched	Not Matched	✗ REJECTED	Cannot route because PATH, HEADER did not match
25	None	Not Matched	Not Matched	None	✗ REJECTED	Cannot route because PATH, METHOD did not match
26	None	Not Matched	Not Matched	Matched	✗ REJECTED	Cannot route because PATH, METHOD did not match
27	None	Not Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because PATH, METHOD, HEADER did not match
28	Matched	None	None	None	✓ SELECTED	All defined criteria OK (HOST)
29	Matched	None	None	Matched	✓ SELECTED	All defined criteria OK (HOST, HEADER)
30	Matched	None	None	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
31	Matched	None	Matched	None	✓ SELECTED	All defined criteria OK (HOST, METHOD)
32	Matched	None	Matched	Matched	✓ SELECTED	All defined criteria OK (HOST, METHOD, HEADER)
33	Matched	None	Matched	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
34	Matched	None	Not Matched	None	✗ REJECTED	Cannot route because METHOD did not match
35	Matched	None	Not Matched	Matched	✗ REJECTED	Cannot route because METHOD did not match
36	Matched	None	Not Matched	Not Matched	✗ REJECTED	Cannot route because METHOD, HEADER did not match
37	Matched	Matched	None	None	✓ SELECTED	All defined criteria OK (HOST, PATH)
38	Matched	Matched	None	Matched	✓ SELECTED	All defined criteria OK (HOST, PATH, HEADER)
39	Matched	Matched	None	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
40	Matched	Matched	Matched	None	✓ SELECTED	All defined criteria OK (HOST, PATH, METHOD)
41	Matched	Matched	Matched	Matched	✓ SELECTED	All defined criteria OK (HOST, PATH, METHOD, HEADER)
42	Matched	Matched	Matched	Not Matched	✗ REJECTED	Cannot route because HEADER did not match
43	Matched	Matched	Not Matched	None	✗ REJECTED	Cannot route because METHOD did not match
44	Matched	Matched	Not Matched	Matched	✗ REJECTED	Cannot route because METHOD did not match
45	Matched	Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because METHOD, HEADER did not match
46	Matched	Not Matched	None	None	✗ REJECTED	Cannot route because PATH did not match
47	Matched	Not Matched	None	Matched	✗ REJECTED	Cannot route because PATH did not match
48	Matched	Not Matched	None	Not Matched	✗ REJECTED	Cannot route because PATH, HEADER did not match
49	Matched	Not Matched	Matched	None	✗ REJECTED	Cannot route because PATH did not match
50	Matched	Not Matched	Matched	Matched	✗ REJECTED	Cannot route because PATH did not match
51	Matched	Not Matched	Matched	Not Matched	✗ REJECTED	Cannot route because PATH, HEADER did not match
52	Matched	Not Matched	Not Matched	None	✗ REJECTED	Cannot route because PATH, METHOD did not match
53	Matched	Not Matched	Not Matched	Matched	✗ REJECTED	Cannot route because PATH, METHOD did not match
54	Matched	Not Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because PATH, METHOD, HEADER did not match
55	Not Matched	None	None	None	✗ REJECTED	Cannot route because HOST did not match
56	Not Matched	None	None	Matched	✗ REJECTED	Cannot route because HOST did not match
57	Not Matched	None	None	Not Matched	✗ REJECTED	Cannot route because HOST, HEADER did not match
58	Not Matched	None	Matched	None	✗ REJECTED	Cannot route because HOST did not match
59	Not Matched	None	Matched	Matched	✗ REJECTED	Cannot route because HOST did not match
60	Not Matched	None	Matched	Not Matched	✗ REJECTED	Cannot route because HOST, HEADER did not match
61	Not Matched	None	Not Matched	None	✗ REJECTED	Cannot route because HOST, METHOD did not match
62	Not Matched	None	Not Matched	Matched	✗ REJECTED	Cannot route because HOST, METHOD did not match
63	Not Matched	None	Not Matched	Not Matched	✗ REJECTED	Cannot route because HOST, METHOD, HEADER did not match
64	Not Matched	Matched	None	None	✗ REJECTED	Cannot route because HOST did not match
65	Not Matched	Matched	None	Matched	✗ REJECTED	Cannot route because HOST did not match
66	Not Matched	Matched	None	Not Matched	✗ REJECTED	Cannot route because HOST, HEADER did not match
67	Not Matched	Matched	Matched	None	✗ REJECTED	Cannot route because HOST did not match
68	Not Matched	Matched	Matched	Matched	✗ REJECTED	Cannot route because HOST did not match
69	Not Matched	Matched	Matched	Not Matched	✗ REJECTED	Cannot route because HOST, HEADER did not match
70	Not Matched	Matched	Not Matched	None	✗ REJECTED	Cannot route because HOST, METHOD did not match
71	Not Matched	Matched	Not Matched	Matched	✗ REJECTED	Cannot route because HOST, METHOD did not match
72	Not Matched	Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because HOST, METHOD, HEADER did not match
73	Not Matched	Not Matched	None	None	✗ REJECTED	Cannot route because HOST, PATH did not match
74	Not Matched	Not Matched	None	Matched	✗ REJECTED	Cannot route because HOST, PATH did not match
75	Not Matched	Not Matched	None	Not Matched	✗ REJECTED	Cannot route because HOST, PATH, HEADER did not match
76	Not Matched	Not Matched	Matched	None	✗ REJECTED	Cannot route because HOST, PATH did not match
77	Not Matched	Not Matched	Matched	Matched	✗ REJECTED	Cannot route because HOST, PATH did not match
78	Not Matched	Not Matched	Matched	Not Matched	✗ REJECTED	Cannot route because HOST, PATH, HEADER did not match
79	Not Matched	Not Matched	Not Matched	None	✗ REJECTED	Cannot route because HOST, PATH, METHOD did not match
80	Not Matched	Not Matched	Not Matched	Matched	✗ REJECTED	Cannot route because HOST, PATH, METHOD did not match
81	Not Matched	Not Matched	Not Matched	Not Matched	✗ REJECTED	Cannot route because HOST, PATH, METHOD, HEADER did not match

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API Proxy Client Route Usage Guide

API Proxy Client Route Usage Guide

Overview

How Does Client Route Work?

Routing Priority Order

Matching Logic

Wildcard Hostname Usage

Wildcard Rules

Wildcard Examples

Left-Side Wildcard

Right-Side Wildcard

Example 2: Host-Based Routing

Example 3: Routing with Missing Header

Example 4: Full Header Match

Example 5: Path Priority - Basic Path

Example 6: Path Priority - Long Path

Example 7: Path with Sub-Path

Example 8: Path Match - Different Sub-Path

Example 9: Host and Header Combination

Important Notes

Path Matching

Host Matching

Header Matching

Method Matching

Routing Combination Table

Başlangıç

Apinizer'ı Anlamak

​API Proxy Client Route Usage Guide

​Overview

​How Does Client Route Work?

​Routing Priority Order

​Matching Logic

​Wildcard Hostname Usage

​Wildcard Rules

​Wildcard Examples

​Left-Side Wildcard

​Right-Side Wildcard

​Example 2: Host-Based Routing

​Example 3: Routing with Missing Header

​Example 4: Full Header Match

​Example 5: Path Priority - Basic Path

​Example 6: Path Priority - Long Path

​Example 7: Path with Sub-Path

​Example 8: Path Match - Different Sub-Path

​Example 9: Host and Header Combination

​Important Notes

​Path Matching

​Host Matching

​Header Matching

​Method Matching

​Routing Combination Table

API Proxy Client Route Usage Guide

Overview

How Does Client Route Work?

Routing Priority Order

Matching Logic

Wildcard Hostname Usage

Wildcard Rules

Wildcard Examples

Left-Side Wildcard

Right-Side Wildcard

Example 2: Host-Based Routing

Example 3: Routing with Missing Header

Example 4: Full Header Match

Example 5: Path Priority - Basic Path

Example 6: Path Priority - Long Path

Example 7: Path with Sub-Path

Example 8: Path Match - Different Sub-Path

Example 9: Host and Header Combination

Important Notes

Path Matching

Host Matching

Header Matching

Method Matching

Routing Combination Table