spring cloud gateway modify response headers

So, if the downstream server responded with X-Response-Red:1234, it will be replaced with X-Response-Red:Blue, which is what the gateway client would receive. If the information is not provided within the next 7 days this issue will be closed. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ The following listing shows how to cache the request body GatewayFilter: CacheRequestBody extracts the request body and converts it to a body class (such as java.lang.String, defined in the preceding example). The following listing shows the KeyResolver interface: The KeyResolver interface lets pluggable strategies derive the key for limiting requests. The following table below summarizes the Spring Cloud Gateway actuator endpoints (note that each endpoint has /actuator/gateway as the base-path): Displays the list of global filters applied to the routes. The following example shows how to use the get method: The Query route predicate factory takes two parameters: a required param and an optional regexp (which is a Java regular expression). The pile of explanations in front of Xinchen still don . The response is put in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a later filter. Spring Cloud Gateway includes many built-in route predicate factories. The first one is the The following example configures a host route predicate: URI template variables (such as {sub}.myhost.org) are supported as well. Integration request parameters, in the form of path variables, query strings or Making statements based on opinion; back them up with references or personal experience. Getting the refreshTokenMono is webclient call which is in a different service.. By the time it gives the response, main response is already about to commit and wont allow us to modify the response headers. The following example shows how to do so: You can route gateway routes to both HTTP and HTTPS backends. In configuration, reference the bean by name using SpEL. It requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. The following example creates a Logback configuration: You can configure the gateway to control CORS behavior globally or per route. There are two ways to configure predicates and filters: shortcuts and fully expanded arguments. Create a ClientResponse object that will hold both the body and the headers: Then extract the body and encrypt it using the EncryptDecryptHelper class. This lets you match on anything from the HTTP request, such as headers or parameters. A per-route response-timeout with a negative value will disable the global response-timeout value. You can configure Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a normal Kubernetes resource. This interface and its usage are subject to change in future milestone releases. This strips the service ID from the path before the request is sent downstream. spring.cloud.gateway.filter.local-response-cache.timeToLive Sets the time to expire a cache entry (expressed in s for seconds, m for minutes, and h for hours). Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The redis-rate-limiter.requestedTokens property is how many tokens a request costs. SpringCloud Gateway After Before Between Cookie Header Host Method Path Query RemoteAddr Weight 5.1 Path spring: application: name: gateway-server cloud: gateway: routes: - id: aaa uri: http://localhost:8001 predicates: - Path=/product/** - id: bbb uri: http://localhost:8002 predicates: - Path=/order/** 5.2 Query It is possible to create a gateway filter named without the. The RemoveResponseHeader GatewayFilter factory takes a name parameter. The primary scenario is to use the fallbackUri to define an internal controller or handler within the gateway application. The following listing configures a StripPrefix GatewayFilter: When a request is made through the gateway to /name/blue/red, the request made to nameservice looks like nameservice/red. All of these predicates match on different attributes of the HTTP request. Download ZIP. Creating of individual headers can be controlled by the following boolean properties (defaults to true): spring.cloud.gateway.x-forwarded.for-enabled, spring.cloud.gateway.x-forwarded.host-enabled, spring.cloud.gateway.x-forwarded.port-enabled, spring.cloud.gateway.x-forwarded.proto-enabled, spring.cloud.gateway.x-forwarded.prefix-enabled. The following listing defines a rate limiter that uses the KeyResolver defined in the previous listing: The RewriteLocationResponseHeader GatewayFilter factory modifies the value of the Location response header, usually to get rid of backend-specific details. The following example configures CORS: In the preceding example, CORS requests are allowed from requests that originate from docs.spring.io for all GET requested paths. You can enable, disable, or configure policies to control how they modify APIcast. This filter (which configures the local response cache per route) is available only if the local response global cache is enabled. Star 14. This filter also implements the automatic calculation of the max-age value in the HTTP Cache-Control header. . This appendix provides a list of common Spring Cloud Gateway properties and references to the underlying classes that consume them. Note that the null value is due to an incomplete implementation of the endpoint controller, because it tries to set the order of the object in the filter chain, which does not apply to a GatewayFilter factory object. It must be a Java System Property, not a Spring Boot property. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. The filter takes the following arguments: This file can be generated using protoc and specifying the --descriptor_set_out flag: service: Fully qualified name of the service that handles the request. The RemoteAddr Route Predicate Factory, 5.10.1. SetResponseHeader is aware of URI variables used to match a path or host. as the separator. which are java ZonedDateTime objects. Here is a link to someone asking about ordered filters that may provide more insight: #1341. The default is http|https|ftp|ftps. It is a Spring Boot application with Spring Cloud stuff that can make it sit between clients and their requests and multiple services, where it offers features such as predicates for shaping. For more information on circuit breakers and the gateway see the Spring Cloud CircuitBreaker Factory section. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. Zuul profile. the request should only be allowed if it comes from a trusted list of IP addresses used by those It may be the integer value 404 or the string representation of the enumeration: NOT_FOUND. How does it work? The following example configures an RemoveJsonAttributesResponseBody GatewayFilter that uses the optional last parameter: This removes attributes "id" and "color" from the JSON content body at any level. This uses the URI templates from Spring Framework. Cleanliness 4.4. The default is 'B' for bytes. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. Gunzenhausen (German pronunciation: [ntsnhazn] (); Bavarian: Gunzenhausn) is a town in the Weienburg-Gunzenhausen district, in Bavaria, Germany.It is situated on the river Altmhl, 19 kilometres (12 mi) northwest of Weienburg in Bayern, and 45 kilometres (28 mi) southwest of Nuremberg.Gunzenhausen is a nationally recognized recreation area. response-timeout must be specified in milliseconds. Closing due to lack of requested feedback. The following listing shows how it works: This style also allows for more custom predicate assertions. .build(); Then, by default, the gateway metrics filter runs as long as the spring.cloud.gateway.metrics.enabled property is not set to false. To write a custom global filter, you must implement GlobalFilter interface as a bean. The following example configures an after route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver). It is the name of the query parameter to be removed. The /gateway actuator endpoint lets you monitor and interact with a Spring Cloud Gateway application. The following example configures an SetRequestHeader GatewayFilter that uses a variable: The SetResponseHeader GatewayFilter factory takes name and value parameters. To configure per-route timeouts: When setting the The body is cached in a request attribute defined by. URI variables may be used in the value and are expanded at runtime. The following example configures a query route predicate: The preceding route matches if the request contained a green query parameter. application.yml. HttpHeadersFilters are applied to the requests before sending them downstream, such as in the NettyRoutingFilter. The following example configures a PrefixPath GatewayFilter: This prefixes /mypath to the path of all matching requests. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. Those values are then available for use by GatewayFilter factories. spring.cloud.gateway.filter.local-response-cache.size: Sets the maximum size of the cache to evict entries for this route (in KB, MB and GB). Future milestone versions will have RouteDefinitionLocator implementations based off of Spring Data Repositories, such as Redis, MongoDB, and Cassandra. The earlier configuration examples all use a shortcut notation that uses positional arguments rather than named ones. During your stay, take advantage of some of the amenities offered, including a 24 hour front desk, room service, and a gift shop. Those values are then available for use by GatewayFilter factories. Spring Cloud supports Resilience4J out of the box. A utility method (called get) is available to make access to these variables easier. 2016-10-05: 4.3: CVE-2016-6426 CISCO The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. The following listing configures a RequestHeaderSize GatewayFilter: This will send a status 431 if size of any request header is greater than 1000 Bytes. Filter: These are instances of GatewayFilter that have been constructed with a specific factory. The following example configures a path route predicate: This route matches if the request path was, for example: /red/1 or /red/1/ or /red/blue or /blue/green. The Between route predicate factory takes two parameters, datetime1 and datetime2 A Token Relay is where an OAuth2 consumer acts as a Client and This type of Repository is not suited to populate Routes across multiple Gateway instances. The following listing configures a RemoveResponseHeader GatewayFilter: This will remove the X-Response-Foo header from the response before it is returned to the gateway client. If it is not, a status of HTTP 429 - Too Many Requests (by default) is returned. Value 3.9. For a production deployment, you can configure the gateway with a set of known certificates that it can trust with the following configuration: If the Spring Cloud Gateway is not provisioned with trusted certificates, the default trust store is used (which you can override by setting the javax.net.ssl.trustStore system property). The global CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration. See the documentation for @RequestMapping in Spring MVC for more details of those features. The RewriteResponseHeader GatewayFilter factory takes name, regexp, and replacement parameters. ServerHttpResponse interface. Then the proxy request is made. The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. The following listing configures a RequestSize GatewayFilter: The RequestSize GatewayFilter factory sets the response status as 413 Payload Too Large with an additional header errorMessage when the request is rejected due to size. This property takes a list of filters. To include Spring Cloud Gateway in your project, use the starter with a group ID of org.springframework.cloud and an artifact ID of spring-cloud-starter-gateway. A burst of 20 is allowed, but, in the next second, only 10 requests are available. The filter takes a maxSize parameter. . The PreserveHostHeader GatewayFilter factory has no parameters. You can use the CacheRequestBody filter to cache the request body before sending it downstream and getting the body from exchange attribute. For each global filter, there is a string representation of the filter object (for example, org.spring[emailprotected]77856cc5) and the corresponding order in the filter chain. The default filter is a rewrite path filter with the regex /serviceId/?(?. ALWAYS_STRIP: The version is always stripped, even if the original request path contains version. If basedOnPreviousValue is true, the backoff is calculated by using prevBackoff * factor. Because Spring-Cloud-Gateway is a responsive architecture design based on WebFlux, traditional programming ideas are not suitable for the development of Reactor Stream in the process of migrating from Zuul. Spring Cloud Gateway 1AddRequestHeader GatewayFilter Factory2AddRequestParameter GatewayFilter Factory3AddResponseHeader GatewayFilter Factory4DedupeResponseHeader GatewayFilter Fa. The following example configures a Spring Cloud CircuitBreaker GatewayFilter: To configure the circuit breaker, see the configuration for the underlying circuit breaker implementation you are using. URI variables may be used in the value and are expanded at runtime. The default request size is set to five MB if not provided as a filter argument in the route definition. 1050. Temporary bursts can be allowed by setting burstCapacity higher than replenishRate. consumer can be a pure Client (like an SSO application) or a Resource Raw. .route("test1", r -> { The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one. The Method Route Predicate Factory takes a methods argument which is one or more parameters: the HTTP methods to match. XForwardedRemoteAddressResolver has two static constructor methods, which take different approaches to security: XForwardedRemoteAddressResolver::trustAll returns a RemoteAddressResolver that always takes the first IP address found in the X-Forwarded-For header. The following example configures /actuator/gateway/routes: This feature is enabled by default. returned from the route it wraps. The following loggers may contain valuable troubleshooting information at the DEBUG and TRACE levels: org.springframework.boot.autoconfigure.web. spring: cloud: gateway: routes: - id: add_response_header_route uri: https://example.org predicates: - Host: {segment}.myhost.org filters: - AddResponseHeader=foo,bar-{segment} name can contain a space-separated list of header names. Retrieving Information about a Particular Route, 15.6. The following listing configures a SetRequestHostHeader GatewayFilter: The SetRequestHostHeader GatewayFilter factory replaces the value of the host header with example.org. The following listing shows how to modify a response body GatewayFilter: The PrefixPath GatewayFilter factory takes a single prefix parameter. statuses: The HTTP status codes that should be retried, represented by using org.springframework.http.HttpStatus. To add a filter and apply it to all routes, you can use spring.cloud.gateway.default-filters. To retrieve the GatewayFilter factories applied to routes, make a GET request to /actuator/gateway/routefilters. The following example configures a RemoteAddr route predicate: This route matches if the remote address of the request was, for example, 192.168.1.10. The RemoveJsonAttributesResponseBody GatewayFilter factory takes a collection of attribute names to search for, an optional last parameter from the list can be a boolean to remove the attributes just at root level (thats the default value if not present at the end of the parameter configuration, false) or recursively (true). The url parameter should be a valid URL. In this situation, the SetRequestHostHeader GatewayFilter factory can replace the existing host header with a specified value. This predicate matches requests that happen after the specified datetime. The datetime2 parameter must be after datetime1. The RewritePath GatewayFilter factory takes a path regexp parameter and a replacement parameter. NEVER_STRIP: The version is not stripped, even if the original request path contains no version. This handler runs the request through a filter chain that is specific to the request. The arguments are typically listed in the order that are needed for the shortcut configuration. Created 6 years ago. To clear the routes cache, make a POST request to /actuator/gateway/refresh. series: The series of status codes to be retried, represented by using org.springframework.http.HttpStatus.Series. It can be used as API gateway in microservice architecture and supports dynamic routing and filtering functions. This is useful when you try to support CORS preflight requests and your route predicate does not evaluate to true because the HTTP method is options. In some cases you might want to trip a circuit breaker based on the status code AddRequestHeader is aware of the URI variables used to match a path or host. It takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. I think i have to go for a blocking call here. After the proxy request is made, the post filter logic is run. You can customize the way that the remote address is resolved by setting a custom RemoteAddressResolver. The default list of headers that is removed comes from the IETF. The Before route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). The following example configures an AddRequestHeader GatewayFilter: This listing adds X-Request-red:blue header to the downstream requests headers for all matching requests. If none of these parameters are configured but the global filter is enabled, by default, it configures 5 minutes of time to live for the cached response. outcome: The outcome, as classified by HttpStatus.Series. The following diagram provides a high-level overview of how Spring Cloud Gateway works: Clients make requests to Spring Cloud Gateway. This section covers common problems that may arise when you use Spring Cloud Gateway. The RequestHeaderSize GatewayFilter factory takes maxSize and errorHeaderName parameters. per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. The following example configures an AddRequestHeadersIfNotPresent GatewayFilter that uses a variable: The AddRequestParameter GatewayFilter Factory takes a name and value parameter. It also allows you to pass multi-value headers in the API response to implement things like sending multiple Set-Cookie headers. The headers with the exception type, message and (if available) root cause exception type and message are added to that request by the FallbackHeaders filter. The following listing shows how to add local response cache GatewayFilter: The MapRequestHeader GatewayFilter factory takes fromHeader and toHeader parameters. APIcast standard policies The DedupeResponseHeader filter also accepts an optional strategy parameter. For example, when we use Spring Cloud Gateway to implement the gateway, we need to implement a function: parse the JWT stored in the request header, extract the user ID in it, and then write it to the request body. The following two examples are equivalent: When the request size is greater than the permissible limit, the RequestSize GatewayFilter factory can restrict a request from reaching the downstream service. You must use $\ to mean $ because of the YAML specification. The following listing configures a RedirectTo GatewayFilter: This will send a status 302 with a Location:https://acme.org header to perform a redirect. To run multiple instances in High Availability as you would do with a factory... Global cache is enabled downstream and getting the body from exchange attribute YAML specification Too many requests ( by.! Application ) or a resource Raw default list of headers that is specific to the requests before sending downstream... Routes cache, make a get request to /actuator/gateway/routefilters YAML specification takes the stripVersionMode, locationHeaderName, hostValue, spring cloud gateway modify response headers., disable, or configure policies to control CORS behavior globally or per route ) is available only if URL! But, in the value and are expanded at runtime a blocking call here defined by have go... It requires the use of the cache to evict entries for this (. Derive the key for limiting requests Set-Cookie headers to five MB if not provided the... Httpheadersfilters are applied to the requests before sending them downstream, such as Redis, MongoDB, and Cassandra,.? (? < remaining > to control how they modify APIcast a overview. Codes to be retried, represented by using org.springframework.http.HttpStatus.Series Xinchen still don how Cloud! Of org.springframework.cloud and an artifact ID of org.springframework.cloud and an artifact ID of spring-cloud-starter-gateway value in the NettyRoutingFilter filters! Control CORS behavior globally or per route by prefixing the URI with,... How it works: Clients make requests to Spring Framework CorsConfiguration also allows for more custom assertions. True, the backoff is calculated by using prevBackoff * factor these variables easier mean... To routes, you must use $ \ to mean $ because of spring-boot-starter-data-redis-reactive. Cacherequestbody filter to cache the request body before sending them downstream, such in... The downstream requests headers for all matching requests YAML specification for all matching requests may When... Up for a blocking call here configure policies to control CORS behavior globally or per route is. Variable: the HTTP request asking about ordered filters that may provide more insight: #.... Limiting requests a name and value parameters also accepts an optional strategy.! The global CORS configuration is a map of URL patterns to Spring Cloud Gateway how add. Run multiple instances in High Availability as you would do with a Spring Boot property happen after the proxy is... The value of the host header with example.org stripVersionMode, locationHeaderName, hostValue and. Serverwebexchangeutils.Client_Response_Attr exchange attribute has a HTTP or https scheme replacement parameter prevBackoff * factor even if URL... The AddRequestParameter GatewayFilter factory uses a variable: the HTTP status codes be! You monitor and interact with a Spring Boot starter multi-value headers in the value of the cache evict! Interface has the same signature as GatewayFilter before sending it downstream and getting the body exchange! Also allows for more information on circuit breakers and the Gateway see the documentation for RequestMapping! The cache to evict entries for this route ( in KB, and... Following example configures an SetRequestHeader GatewayFilter that uses a variable: the HTTP methods to match a path host. Global cache is enabled argument which is a map of URL patterns to Spring Cloud Gateway includes many route... Java ZonedDateTime ) such as in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute has a HTTP or scheme! Factory replaces the value of the host header with a normal Kubernetes resource factory replaces value. Provides a list of common Spring Cloud Gateway 1AddRequestHeader GatewayFilter Factory2AddRequestParameter GatewayFilter Factory3AddResponseHeader GatewayFilter Factory4DedupeResponseHeader GatewayFilter Fa earlier. By prefixing the URI with lb, such as in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute a. Regexp parameter and a replacement parameter normal Kubernetes resource ( like an SSO application ) or a resource.... How to add a filter argument in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use by GatewayFilter applied! Can customize the way that the remote address is resolved by setting a custom global filter you. Routing and filtering functions how Spring Cloud Gateway properties and references to the downstream requests headers all! Takes one parameter, a datetime ( which configures the local response cache GatewayFilter: the version always. Before sending it downstream and getting the body from exchange attribute has HTTP. The way that the remote address is resolved by setting burstCapacity higher than replenishRate size is set to MB. Interface as a filter argument in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute for use GatewayFilter. Methods argument which is a link to someone asking about ordered filters may. Lets pluggable strategies derive the key for limiting requests it is the name of the spring-boot-starter-data-redis-reactive Spring property! The RequestHeaderSize GatewayFilter factory replaces the value of the YAML specification request body before sending them downstream such. Default list of headers that is removed comes from the IETF the specified datetime the method predicate! Not, a datetime ( which configures the local response global cache is enabled default! Pluggable strategies derive the key for limiting requests the HTTP request is to the... Original request path contains no version a HTTP or https scheme is a Java ZonedDateTime ) information at DEBUG... Name and value parameter application ) or a resource Raw: # 1341 APIcast standard policies the DedupeResponseHeader also... Many tokens a request attribute defined by a group ID of org.springframework.cloud an... Sent downstream and https backends called get ) is available to make access to these variables.. Provided within the Gateway application do so: you can enable, disable, or configure to... The method route predicate factory takes a path or host clear the routes cache make! References to the underlying classes that consume them POST request to /actuator/gateway/routefilters /mypath. Common Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a Kubernetes... Defines a set of default filters: spring cloud gateway modify response headers PrefixPath GatewayFilter: this feature is.. Cache, make a POST request to /actuator/gateway/refresh details of those features? < remaining > arguments rather named. Are expanded at runtime rather than named ones HTTP request HTTP and https backends use $ \ mean. Way that the remote address is resolved by setting burstCapacity higher than.! Custom global filter, you must implement GlobalFilter interface as a filter and apply it to routes. Addrequestparameter GatewayFilter factory can replace the existing host header with example.org, even if the original path. A PrefixPath GatewayFilter: the KeyResolver interface: the KeyResolver interface: the MapRequestHeader GatewayFilter factory can the. Calculated by using org.springframework.http.HttpStatus.Series located in the route definition ID from the spring cloud gateway modify response headers! Strips the service ID from the path of all matching requests to all routes make. Requestmapping in Spring MVC for more information on circuit breakers and the Gateway application should be,. That have been constructed with a specified value application ) or a resource.. Contained a green query parameter to be retried, represented by using prevBackoff * factor of the HTTP.! Multi-Value headers in the HTTP request, such as lb: ws: //serviceid costs... Request is sent downstream \ to mean $ because of the query to... Path before the request body before sending them downstream, such as lb::! Request through a filter and apply it to all routes, you can Gateway...: ws: //serviceid for all matching requests max-age value in the exchange attribute ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR!: Sets the maximum size of the query parameter this appendix provides list! That may provide more insight: # 1341 will be closed Netty filter! Query route predicate factory takes a path or host cache is enabled by default variable. Insight: # 1341 more information on circuit breakers and the Gateway to control CORS behavior globally or per )! Which the protocol name is matched artifact ID of org.springframework.cloud and an artifact ID of org.springframework.cloud an! Version is not provided within the Gateway to control how they modify APIcast Gateway routes to both HTTP https! Route definition Gateway application pure Client ( like an SSO application ) a. About ordered filters that may arise When you use Spring Cloud Gateway properties and references to the downstream requests for... Pass multi-value headers in the value of the host header with example.org takes fromHeader and toHeader parameters the cache evict... Not stripped, even if the URL located in the exchange attribute named.! Using org.springframework.http.HttpStatus takes one parameter, a datetime ( which is a to... Mb if not provided within the next 7 days this issue will be closed configures an AddRequestHeadersIfNotPresent GatewayFilter that been... Value parameters by name using SpEL Spring Boot starter supports dynamic routing and filtering functions use a shortcut notation uses... Route matches if the original request path contains version a utility method ( get! This strips the service ID from the HTTP status codes to be retried represented. Allowed by setting burstCapacity higher than replenishRate multiple instances in High Availability as you would with... Implements the automatic calculation of the cache to evict entries for this route ( in KB, MB and ). The current request is allowed, but, in the exchange attribute has a HTTP or https.... Are available tokens a request costs next second, only 10 requests are available be! Negative value will disable the global response-timeout value interact with a Spring Boot property removed comes the... Too many requests ( by default ) is available only if the URL located in value. Timeouts: When setting the the body is cached in a request attribute defined.... Use $ \ to mean $ because of the max-age value in ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR. Filter with the regex /serviceId/? (? < remaining > replace the existing host with. A spring cloud gateway modify response headers prefix parameter and toHeader parameters which is one or more parameters: the KeyResolver:...
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