API Management in Azure Cheatsheets
API Management in Azure Cheatsheets
By Saeed Salehi
5 min read
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Part of series
Developing Solutions for Microsoft Azure (AZ-204) certification exam Cheatsheets
- Part 1:
Introduction to (AZ-204) certification exam Cheatsheets
- Part 2:
Implement IaaS in Azure Cheatsheets
- Part 3:
Azure Functions Cheatsheets
- Part 4:
Azure App Service Cheatsheets
- Part 5:
Develop solutions that use Blob storage Cheatsheets
- Part 6:
Develop solutions that use Azure Cosmos DB Cheatsheets
- Part 7:
Implement Azure Security Cheatsheet
- Part 8:
Microsoft Identity platform Cheatsheet
- Part 9:
Monitoring And logging in Azure Cheatsheets
- Part 10:
Azure Cache for Redis Cheatsheets
- Part 11:
Develop message-based solutions Cheatsheets
- Part 12:
Develop event-based solutions Cheatsheets
- Part 13:
API Management in Azure Cheatsheets
API Management helps organizations publish APIs to external.
Components
API gateway
- Accepts API calls and routes them to your backend(s).
- Verifies API keys, JWT tokens, certificates, and other credentials.
- Enforces usage quotas and rate limits.
- Transforms your API on the fly without code modifications.
- Caches backend responses where set up.
- Logs call metadata for analytics purposes.
Azure portal: administrative interface
- Define or import API schema.
- Package APIs into products.
- Set up policies like quotas or transformations on the APIs.
- Get insights from analytics.
- Manage users.
Developer portal:
- Read API documentation.
- Try out an API via the interactive console.
- Create an account and subscribe to get API keys.
- Access analytics on their own usage.
Products:
- Open
- Protected (must be subscribed to before they can be used)
Groups:
- Administrators: Azure subscription administrators , manage API Management service instances
- Developers: Authenticated developer portal users,the customers that build applications using your APIs
- Guests: Unauthenticated developer portal users,can be granted certain read-only access, such as the ability to view APIs but not call them
API gateways
- Gateway routing: reverse proxy to route requests to one or more backend services using layer 7 routing.
- Gateway aggregation: Use the gateway to aggregate multiple individual requests into a single request. This pattern applies when a single operation requires calls to multiple backend services
- Gateway Offloading: Use the gateway to offload functionality from individual services to the gateway, like SSL termination, Authentication, IP allow/block list, Client rate limiting (throttling), Logging and monitoring, Response caching, GZIP compression, Servicing static content
API Management policies
collection of Statements that are executed sequentially on the request or response of an API. simple XML document
inbound
, backend
, outbound
, and on-error
<policies>
<inbound>
<!-- statements to be applied to the request go here -->
</inbound>
<backend>
<!-- statements to be applied before the request is forwarded to
the backend service go here -->
</backend>
<outbound>
<!-- statements to be applied to the response go here -->
</outbound>
<on-error>
<!-- statements to be applied if there is an error condition go here -->
</on-error>
</policies>
Filter response content
- Control flow - Conditionally applies policy statements based on the results of the evaluation of Boolean expressions.
- Forward request - Forwards the request to the backend service. Limit concurrency - Prevents enclosed policies from executing by more than the specified number of requests at a time.
- Log to Event Hub - Sends messages in the specified format to an Event Hub defined by a Logger entity.
- Mock response - Aborts pipeline execution and returns a mocked response directly to the caller.
- Retry - Retries execution of the enclosed policy statements, if and until the condition is met. Execution will repeat at the specified time intervals and up to the specified retry count.
Control Flow (Condition)
<choose>
<when condition="Boolean expression | Boolean constant">
<!— one or more policy statements to be applied if the above condition is true -->
</when>
<when condition="Boolean expression | Boolean constant">
<!— one or more policy statements to be applied if the above condition is true -->
</when>
<otherwise>
<!— one or more policy statements to be applied if none of the above conditions are true -->
</otherwise>
</choose>
Forward request
forwards the incoming request to the backend service specified in the request context
<forward-request timeout="time in seconds" follow-redirects="true | false"/>
Limit concurrency
Events enclosed policies from executing by more than the specified number of requests at any time 429 Too Many Requests status code
<limit-concurrency key="expression" max-count="number">
<!— nested policy statements -->
</limit-concurrency>
Log to Event Hub
saving selected request or response context information
<log-to-eventhub logger-id="id of the logger entity" partition-id="index of the partition where messages are sent" partition-key="value used for partition assignment">
Expression returning a string to be logged
</log-to-eventhub>
Mock response
Aborts normal pipeline execution and returns a mocked response to the calls
It generates sample responses from schemas, when schemas are provided and examples are not. If neither examples or schemas are found, responses with no content are returned
<mock-response status-code="code" content-type="media type"/>
Retry
The retry policy executes its child policies once and then retries their execution until the retry condition becomes false or retry count is exhausted.
<retry
condition="boolean expression or literal"
count="number of retry attempts"
interval="retry interval in seconds"
max-interval="maximum retry interval in seconds"
delta="retry interval delta in seconds"
first-fast-retry="boolean expression or literal">
<!-- One or more child policies. No restrictions -->
</retry>
Return response
Aborts pipeline execution and returns either a default or custom response to the caller. Default response is 200 OK with no body
<return-response response-variable-name="existing context variable">
<set-header/>
<set-body/>
<set-status/>
</return-response>
:
Secure APIs
subscription keys
A subscription key is a unique auto-generated key that can be passed through in the headers of the client request or as a query string parameter
subscription scopes are:
- All APIs
- Single API
- Product
Every subscription has two keys, a primary and a secondary. Having two keys makes it easier when you do need to regenerate a key
OAuth2.0
Client certificates
IP allow listing
Call an API with the subscription key
must include a valid key in all HTTP request
The default header name is Ocp-Apim-Subscription-Key
, and the default query string is subscription-key
.
Authentication policies
- Authenticate with Basic: This policy effectively sets the
HTTP Authorization header
to the value corresponding to the credentials provided in the policy - Authenticate with client certificate: The certificate needs to be installed into API Management first and is identified by its
thumbprint
orcertificate ID
(resource name).
Authenticate with managed identity - This policy essentially uses the managed identity to obtain an access token from Azure Active Directory
Secure APIs by using certificates
inspect the certificate contained within the client request and check for properties like:
- Certificate Authority (CA)
- Thumbprint
- Subject
- Expiration Date
two common ways to verify a certificate::
- Check who issued the certificate
- self-signed certificates (If the certificate is issued by the partner, verify that it came from them. )
In the Consumption tier, you must explicitly enable the use of client certificate
inbound processing policy
Check the thumbprint of a client certificate
<choose>
<when condition="@(context.Request.Certificate == null || context.Request.Certificate.Thumbprint != "desired-thumbprint")" >
<return-response>
<set-status code="403" reason="Invalid client certificate" />
</return-response>
</when>
</choose>
Check the thumbprint against certificates uploaded to API Management
Usually, each customer or partner company would pass a different certificate with a different thumbprint
Client certificates page in the Azure portal to upload them to the API Management resource
<choose>
<when condition="@(context.Request.Certificate == null || !context.Request.Certificate.Verify() || !context.Deployment.Certificates.Any(c => c.Value.Thumbprint == context.Request.Certificate.Thumbprint))" >
<return-response>
<set-status code="403" reason="Invalid client certificate" />
</return-response>
</when>
</choose>
Create a backend API
Create APIM instance
az apim create -n $myApiName \
--location $myLocation \
--publisher-email $myEmail \
--resource-group az204-apim-rg \
--publisher-name AZ204-APIM-Exercise \
--sku-name Consumptionhk
Upcoming events
Drupal CMS Launch Party
Zoals sommigen misschien weten wordt op 15 Januari een nieuwe distributie van Drupal gelanceerd. Namelijk Drupal CMS (ook wel bekend als Starshot). Om dit te vieren gaan we op onze campus een klein eventje organiseren. We gaan die dag samen de livestream volgen waarbij het product gelanceerd wordt. De agenda is als volgt: 17u – 18u30: Drupal CMS livestream met taart 18u30 – 19u00: Versteld staan van de functionaliteiten 19u – 20u: Pizza eten en verder versteld staan van de functionaliteiten Laat ons zeker weten of je komt of niet door de invite te accepteren! Tot dan!
| Coven of Wisdom Herentals
Go to page for Drupal CMS Launch PartyCoven of Wisdom - Herentals - Winter `24 edition
Worstelen jij en je team met het bouwen van schaalbare digitale ecosystemen of zit je vast in een props hell met React of in een ander framework? Kom naar onze meetup waar ervaren sprekers hun inzichten en ervaringen delen over het bouwen van robuuste en flexibele applicaties. Schrijf je in voor een avond vol kennis, heerlijk eten en een mix van creativiteit en technologie! 🚀 18:00 – 🚪 Deuren open 18:15 – 🍕 Food & drinks 19:00 – 📢 Building a Mature Digital Ecosystem - Maarten Heip 20:00 – 🍹 Kleine pauze 20:15 – 📢 Compound Components: A Better Way to Build React Components - Sead Memic 21:00 – 🙋♀️ Drinks 22:00 – 🍻 Tot de volgende keer? Tijdens deze meetup gaan we dieper in op het bouwen van digitale ecosystemen en het creëren van herbruikbare React componenten. Maarten deelt zijn expertise over het ontwikkelen van een volwassen digitale infrastructuur, terwijl Sead je laat zien hoe je 'From Props Hell to Component Heaven' kunt gaan door het gebruik van Compound Components. Ze delen praktische inzichten die je direct kunt toepassen in je eigen projecten. 📍 Waar? Je vindt ons bij iO Herentals - Zavelheide 15, Herentals. Volg bij aankomst de borden 'meetup' vanaf de receptie. 🎫 Schrijf je in! De plaatsen zijn beperkt, dus RSVP is noodzakelijk. Dit helpt ons ook om de juiste hoeveelheid eten en drinken te voorzien - we willen natuurlijk niet dat iemand met een lege maag naar huis gaat! 😋 Over iO Wij zijn iO: een groeiend team van experts die end-to-end-diensten aanbieden voor communicatie en digitale transformatie. We denken groot en werken lokaal. Aan strategie, creatie, content, marketing en technologie. In nauwe samenwerking met onze klanten om hun merken te versterken, hun digitale systemen te verbeteren en hun toekomstbestendige groei veilig te stellen. We helpen klanten niet alleen hun zakelijke doelen te bereiken. Samen verkennen en benutten we de eindeloze mogelijkheden die markten in constante verandering bieden. De springplank voor die visie is talent. Onze campus is onze broedplaats voor innovatie, die een omgeving creëert die talent de ruimte en stimulans geeft die het nodig heeft om te ontkiemen, te ontwikkelen en te floreren. Want werken aan de infinite opportunities van morgen, dat doen we vandaag.
| Coven of Wisdom Herentals
Go to page for Coven of Wisdom - Herentals - Winter `24 editionThe Test Automation Meetup
PLEASE RSVP SO THAT WE KNOW HOW MUCH FOOD WE WILL NEED Test automation is a cornerstone of effective software development. It's about creating robust, predictable test suites that enhance quality and reliability. By diving into automation, you're architecting systems that ensure consistency and catch issues early. This expertise not only improves the development process but also broadens your skillset, making you a more versatile team member. Whether you're a developer looking to enhance your testing skills or a QA professional aiming to dive deeper into automation, RSVP for an evening of learning, delicious food, and the fusion of coding and quality assurance! 🚀🚀 18:00 – 🚪 Doors open to the public 18:15 – 🍕 Let’s eat 19:00 – 📢 First round of Talks 19:45 – 🍹 Small break 20:00 – 📢 Second round of Talks 20:45 – 🍻 Drinks 21:00 – 🙋♀️ See you next time? First Round of Talks: The Power of Cross-browser Component Testing - Clarke Verdel, SR. Front-end Developer at iO How can you use Component Testing to ensure consistency cross-browser? Overcoming challenges in Visual Regression Testing - Sander van Surksum, Pagespeed | Web Performance Consultant and Sannie Kwakman, Freelance Full-stack Developer How can you overcome the challenges when setting up Visual Regression Testing? Second Round of Talks: Omg who wrote this **** code!? - Erwin Heitzman, SR. Test Automation Engineer at Rabobank How can tests help you and your team? Beyond the Unit Test - Christian Würthner, SR. Android Developer at iO How can you do advanced automated testing for, for instance, biometrics? RSVP now to secure your spot, and let's explore the fascinating world of test automation together!
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