In Spring boot(SB) 2 the configuration was different, now in SB3 we need to configure the rest client differently. Before SB3 there was RestTemplate now there is new Rest api coming in spring world. Find more details here.
The big difference is properties configuration, it is changed and not documented on spring site
logging.level.org.apache.hc.client5.http.wire=DEBUG logging.level.org.apache.hc.client5.http=DEBUG
Using only “wire” will give request/response dump. And that extra http=DEBUG will give connection and more debug log, find it at the end of the page.
@Bean
public RestClient getWebClient() {
return RestClient.builder()
.requestFactory(new HttpComponentsClientHttpRequestFactory())
.build();
}
@Bean
public RestTemplate getRestTemplate() {
RestTemplate restTemplate = new RestTemplate();
restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory());
return restTemplate;
}
Controller side
@GetMapping(path = "/hello", produces = "application/json")
public String hello() {
return client.get().uri("http://httpbin.org/get?test=2")
.retrieve().body(String.class);
}
@GetMapping(path = "/hello2", produces = "application/json")
public String hello2() {
return restTemplate.getForObject("http://httpbin.org/get?test=1", String.class);
}
debug log
C:\Users\ozkan\.jdks\openjdk-21.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:C:\Users\ozkan\AppData\Local\Programs\IntelliJ IDEA Ultimate\lib\idea_rt.jar=49346:C:\Users\ozkan\AppData\Local\Programs\IntelliJ IDEA Ultimate\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\ozkan\projects\HttpDebugLogging\build\classes\java\main;C:\Users\ozkan\projects\HttpDebugLogging\build\resources\main;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-web.2.54d75553c6af42122d4db645f4924a95084e382\spring-boot-starter-web-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.httpcomponents.client5\httpclient5.3.1b53c8f4bcdaada801d311cf2ff8a24d6d96883\httpclient5-5.3.1.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-json.2.5df311af4c242eb95c3526f48ab4f31c384a247e\spring-boot-starter-json-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter.2.5\a9837a876129cc6fe5f3abf1de5ec0a16faaf003\spring-boot-starter-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-tomcat.2.5\a40ebfa6becb35b419b37e49e33b2822e22cf42a\spring-boot-starter-tomcat-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-webmvc.1.6\ef1f76db6d94bac428839cb91fa59235c8356e56\spring-webmvc-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-web.1.6a32e3497fe39550da3b280bda5d9933ae2d51d\spring-web-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.httpcomponents.core5\httpcore5-h2.2.472764df7b4857549e2880dd32a6f9009166289\httpcore5-h2-5.2.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.httpcomponents.core5\httpcore5.2.4d8332b975f9e9a8298efe4c883ec43d45b7059\httpcore5-5.2.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.slf4j\slf4j-api.0.13229737f704b121a318bba5d5deacbcf395bc77\slf4j-api-2.0.13.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.datatype\jackson-datatype-jsr310.15.4de629770a4559db57128d35ccae7d2fddd35db3\jackson-datatype-jsr310-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.module\jackson-module-parameter-names.15.4\e654497a08359db2521b69b5f710e00836915d8c\jackson-module-parameter-names-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.datatype\jackson-datatype-jdk8.15.44777f182334a21bf1aeab1b04cc4398c801f3f\jackson-datatype-jdk8-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-databind.15.40309fc381f77d4d15c4a4cdaa0db5025c4fd13\jackson-databind-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-logging.2.5cf3a346da7bb624381ccc21d7a27500181de63\spring-boot-starter-logging-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-autoconfigure.2.585a2c00a03edb896b2833e4bdee2ae53cd69b8\spring-boot-autoconfigure-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot.2.5\eec72431f6f56a50c9919129665ba3359ca02104\spring-boot-3.2.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\jakarta.annotation\jakarta.annotation-api.1.1b9bda22b091b1f48b13af03fe36db3be6e1ae3\jakarta.annotation-api-2.1.1.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-core.1.6\dea4b8e110b7b54a02a4907e32dbb0adee8a7168\spring-core-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.yaml\snakeyaml.2af797a25458550a16bf89acc8e4ab2b7f2bfce0\snakeyaml-2.2.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-websocket.1.20502adffaf9e6e4bc2b63a557e348d7f6c0faf7\tomcat-embed-websocket-10.1.20.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-core.1.20\ba0dc784e12086f83d8e1d5a10443b166abf5780\tomcat-embed-core-10.1.20.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.tomcat.embed\tomcat-embed-el.1.20\cc1a42b8228699e92c8eba0187eccf54bf892802\tomcat-embed-el-10.1.20.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-context.1.6be30298638975efaf7fff22f1570d79b2679814\spring-context-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aop.1.658f52cb9fcb3adf7e836304550de5431a9347e\spring-aop-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-beans.1.62d80ff134420db4ebf7614758e6a02a9bd3c41\spring-beans-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-expression.1.6c3d7f0e17a919a4ea9f087e4e2140ad39776bc8\spring-expression-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\io.micrometer\micrometer-observation.12.5\ee23704259a1aad5c8f503db4d37cdfe5352e766\micrometer-observation-1.12.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-annotations.15.423ea5a9bf52cdc9c5e537a0e52f2432eaf208b\jackson-annotations-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-core.15.4\aebe84b45360debad94f692a4074c6aceb535fa0\jackson-core-2.15.4.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-classic.4.14\d98bc162275134cdf1518774da4a2a17ef6fb94d\logback-classic-1.4.14.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-to-slf4j.21.1\d77b2ba81711ed596cd797cc2b5b5bd7409d841c\log4j-to-slf4j-2.21.1.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.slf4j\jul-to-slf4j.0.13\a3bcd9d9dd50c71ce69f06b1fd05e40fdeff6ba5\jul-to-slf4j-2.0.13.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.springframework\spring-jcl.1.6cb19b30b22feca73c2ac005ca849c5890935a3\spring-jcl-6.1.6.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\io.micrometer\micrometer-commons.12.5\da45afd81a6a05267df5ddfe10438ea857e0f7d9\micrometer-commons-1.12.5.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-core.4.14d3c2248219ac0effeb380ed4c5280a80bf395e8\logback-core-1.4.14.jar;C:\Users\ozkan\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-api.21.1c65e87b9ce1694a01524e192d7be989ba70486\log4j-api-2.21.1.jar io.github.ozkanpakdil.cloudtest.CloudTestApplication
. _______ _ _
/\ / ___'___ _ _(_)_ ____ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' | ____| .__ |_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.5)
INFO io.github.ozkanpakdil.cloudtest.CloudTestApplication - Starting CloudTestApplication using Java 21.0.2 with PID 16624 (C:\Users\ozkan\projects\HttpDebugLogging\build\classes\java\main started by ozkan in C:\Users\ozkan\projects\HttpDebugLogging)
INFO io.github.ozkanpakdil.cloudtest.CloudTestApplication - No active profile set, falling back to 1 default profile: "default"
INFO org.springframework.boot.web.embedded.tomcat.TomcatWebServer - Tomcat initialized with port 8080 (http)
INFO org.apache.catalina.core.StandardService - Starting service [Tomcat]
INFO org.apache.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/10.1.20]
INFO org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext
INFO org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext - Root WebApplicationContext: initialization completed in 2800 ms
INFO org.springframework.boot.web.embedded.tomcat.TomcatWebServer - Tomcat started on port 8080 (http) with context path ''
INFO io.github.ozkanpakdil.cloudtest.CloudTestApplication - Started CloudTestApplication in 5.901 seconds (process running for 8.934)
INFO org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/] - Initializing Spring DispatcherServlet 'dispatcherServlet'
INFO org.springframework.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet'
INFO org.springframework.web.servlet.DispatcherServlet - Completed initialization in 1 ms
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000001 preparing request execution
DEBUG org.apache.hc.client5.http.impl.classic.ProtocolExec - ex-0000000001 target auth state: UNCHALLENGED
DEBUG org.apache.hc.client5.http.impl.classic.ProtocolExec - ex-0000000001 proxy auth state: UNCHALLENGED
DEBUG org.apache.hc.client5.http.impl.classic.ConnectExec - ex-0000000001 acquiring connection with route {}->http://httpbin.org:80
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000001 acquiring endpoint (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000001 endpoint lease request (3 MINUTES) [route: {}->http://httpbin.org:80][total available: 0; route allocated: 0 of 5; total allocated: 0 of 25]
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000001 endpoint leased [route: {}->http://httpbin.org:80][total available: 0; route allocated: 1 of 5; total allocated: 1 of 25]
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000001 acquired ep-0000000001
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000001 acquired endpoint ep-0000000001
DEBUG org.apache.hc.client5.http.impl.classic.ConnectExec - ex-0000000001 opening connection {}->http://httpbin.org:80
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000001 connecting endpoint (null)
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000001 connecting endpoint to http://httpbin.org:80 (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org resolving remote address
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org resolved to [httpbin.org/34.198.16.126, httpbin.org/52.206.26.65, httpbin.org/18.208.239.112, httpbin.org/3.233.6.75]
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org:80 connecting null->httpbin.org/34.198.16.126:80 (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.DefaultManagedHttpClientConnection - http-outgoing-0 set socket timeout to 3 MINUTES
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org:80 connected null->httpbin.org/34.198.16.126:80 as http-outgoing-0
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000001 connected http-outgoing-0
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000001 endpoint connected
DEBUG org.apache.hc.client5.http.impl.classic.MainClientExec - ex-0000000001 executing GET /get?test=2 HTTP/1.1
DEBUG org.apache.hc.client5.http.protocol.RequestAddCookies - ex-0000000001 Cookie spec selected: strict
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000001 start execution ex-0000000001
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000001 executing exchange ex-0000000001 over http-outgoing-0
DEBUG org.apache.hc.client5.http.headers - http-outgoing-0 >> GET /get?test=2 HTTP/1.1
DEBUG org.apache.hc.client5.http.headers - http-outgoing-0 >> Accept-Encoding: gzip, x-gzip, deflate
DEBUG org.apache.hc.client5.http.headers - http-outgoing-0 >> Host: httpbin.org
DEBUG org.apache.hc.client5.http.headers - http-outgoing-0 >> Connection: keep-alive
DEBUG org.apache.hc.client5.http.headers - http-outgoing-0 >> User-Agent: Apache-HttpClient/5.3.1 (Java/21.0.2)
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "GET /get?test=2 HTTP/1.1[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "Accept-Encoding: gzip, x-gzip, deflate[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "Host: httpbin.org[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "Connection: keep-alive[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "User-Agent: Apache-HttpClient/5.3.1 (Java/21.0.2)[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 >> "[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-0 http://httpbin.org:80][total available: 1; route allocated: 1 of 5; total allocated: 1 of 25]
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000002 preparing request execution
DEBUG org.apache.hc.client5.http.impl.classic.ProtocolExec - ex-0000000002 target auth state: UNCHALLENGED
DEBUG org.apache.hc.client5.http.impl.classic.ProtocolExec - ex-0000000002 proxy auth state: UNCHALLENGED
DEBUG org.apache.hc.client5.http.impl.classic.ConnectExec - ex-0000000002 acquiring connection with route {}->http://httpbin.org:80
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000002 acquiring endpoint (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000002 endpoint lease request (3 MINUTES) [route: {}->http://httpbin.org:80][total available: 0; route allocated: 0 of 5; total allocated: 0 of 25]
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000002 endpoint leased [route: {}->http://httpbin.org:80][total available: 0; route allocated: 1 of 5; total allocated: 1 of 25]
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ex-0000000002 acquired ep-0000000002
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ex-0000000002 acquired endpoint ep-0000000002
DEBUG org.apache.hc.client5.http.impl.classic.ConnectExec - ex-0000000002 opening connection {}->http://httpbin.org:80
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000002 connecting endpoint (null)
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000002 connecting endpoint to http://httpbin.org:80 (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org resolving remote address
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org resolved to [httpbin.org/34.198.16.126, httpbin.org/52.206.26.65, httpbin.org/18.208.239.112, httpbin.org/3.233.6.75]
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org:80 connecting null->httpbin.org/34.198.16.126:80 (3 MINUTES)
DEBUG org.apache.hc.client5.http.impl.io.DefaultManagedHttpClientConnection - http-outgoing-1 set socket timeout to 3 MINUTES
DEBUG org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator - httpbin.org:80 connected null->httpbin.org/34.198.16.126:80 as http-outgoing-1
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000002 connected http-outgoing-1
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000002 endpoint connected
DEBUG org.apache.hc.client5.http.impl.classic.MainClientExec - ex-0000000002 executing GET /get?test=1 HTTP/1.1
DEBUG org.apache.hc.client5.http.protocol.RequestAddCookies - ex-0000000002 Cookie spec selected: strict
DEBUG org.apache.hc.client5.http.impl.classic.InternalHttpClient - ep-0000000002 start execution ex-0000000002
DEBUG org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager - ep-0000000002 executing exchange ex-0000000002 over http-outgoing-1
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> GET /get?test=1 HTTP/1.1
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> Accept: text/plain, application/json, application/*+json, */*
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> Accept-Encoding: gzip, x-gzip, deflate
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> Host: httpbin.org
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> Connection: keep-alive
DEBUG org.apache.hc.client5.http.headers - http-outgoing-1 >> User-Agent: Apache-HttpClient/5.3.1 (Java/21.0.2)
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "GET /get?test=1 HTTP/1.1[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "Accept: text/plain, application/json, application/*+json, */*[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "Accept-Encoding: gzip, x-gzip, deflate[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "Host: httpbin.org[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "Connection: keep-alive[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "User-Agent: Apache-HttpClient/5.3.1 (Java/21.0.2)[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 >> "[\r][\n]"
DEBUG org.apache.hc.client5.http.wire - http-outgoing-1 http://httpbin.org:80][total available: 1; route allocated: 1 of 5; total allocated: 1 of 25]
find full working example here
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mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
