Foreword In data visualization, it is often necessary to partially enlarge the data in a certain interval to obtain a higher contrast visualization effect. The following uses the Matplotlib library of the Python language to implement a simple partial magnification effect. Dependent libraries matplotlib: plotting library numpy: an extended library that supports a large number […]
Tag: rest
After nginx proxy, get the real IP and do concurrent access restriction (current limiting)
When the site is running, in order to prevent DDoS attacks or data bursts caused by internal interface calls, nginx provides a limit current limiting module: HttpLimitZoneModule limits the number of concurrent accesses at the same time. HttpLimitReqModule limits access to data, up to a few requests per second. 1. Normal configuration: What is a […]
RESTful web service based on JAX-WS returns xml document generated through JAXB annotations
A RESTful web service written based on JAX-WS that returns xml documents. This xml document can be generated based on JAXB annotations, simplifying xml generation. In order to use the dependent libraries, you can add the following dependencies in the pom.xml file of the maven project: <dependency> <groupId>jakarta.xml.ws</groupId> <artifactId>jakarta.xml.ws-api</artifactId> <version>4.0.0</version> </dependency> <dependency> <groupId>com.sun.xml.ws</groupId> <artifactId>jaxws-rt</artifactId> <version>4.0.0</version> […]
93. Restore IP Addresses 78. Subsets 90. Subsets II
93. Restore IP Addresses A valid IP address consists of exactly four integers separated by single dots. Each integer is between 0 and 255 (inclusive) and cannot have leading zeros. For example, “0.1.2.201” and “192.168.1.1” are valid IP addresses, but “0.011.255.245”, “192.168.1.312” and “[email protected]” are invalid IP addresses. Given a string s containing only digits, […]
Matinal: Analysis of the whole process of SAP ABAP publishing HTTP RestFul service (5)
1. Background introduction RESTful is a design style and development method for web applications. REST is the abbreviation of Representational State Transfer, and the Chinese translation is “representational state transfer”. It may not be easy to understand REST from the definition alone. For students who have just come into contact with this concept, REST can […]
Restart your Android journey
When I took the Android course in college in 2017, I vowed that I would never deal with Android again in my life. Then I spent a week studying the teacher’s knowledge points in “The First Line of Code” and recorded the notes on CSDN. . Five years later, when I was looking for a […]
postman interface testing-Restful interface development and testing
After developing the interface, we need to test the interface we developed. There are many methods for interface testing. You can use interface tools or Python to test. Tools such as Postman or Jmeter that we have learned before. Python script testing can use Requests + unittest to test. Testing Ideas Functional testing: addition, deletion, […]
Matinal: Analysis of the whole process of SAP ABAP publishing HTTP RestFul service (4)
1. Concept 1.1. How SAP provides Http Service If you want to use the SAP application server as an http service provider, you need to define a class, which must implement the IF_HTTP_EXTENSION interface. The IF_HTTP_EXTENSION interface has only one method, HANDLE_REQUEST. This customized class must implement the HANDLE_REQUEST method. The SERVER parameter of the […]
Matinal: Analysis of the whole process of SAP ABAP publishing HTTP RestFul service (1)
1.SE24 new class: ZCL_REST_QUERY Activate, then add interface:IF_HTTP_EXTENSION and activate. 2. Implement IF_HTTP_EXTENSION~HANDLE_REQUEST: METHOD IF_HTTP_EXTENSION~HANDLE_REQUEST. DATA: LT_FIELDS TYPE TIHTTPNVP, LV_HEADER_QUERY TYPE STRING, LV_DATA TYPE STRING, LV_HTML TYPE STRING. FIELD-SYMBOLS: <FS_FIELD> LIKE LINE OF LT_FIELDS. *” get HEADER fields SERVER->REQUEST->GET_HEADER_FIELDS( CHANGING FIELDS = LT_FIELDS ” Header fields ). LV_DATA = SERVER->REQUEST->IF_HTTP_ENTITY~GET_CDATA( ). ” Read the fields […]
Resource Groups And Selector of Presto Resource Management
Article directory Preface Resource group configuration Selector Rules Selector Rules Global Configuration Global Properties selector properties Configuration case Configuration prestoDb Foreword Resource groups limit resource usage and can enforce queuing policies on queries that run within them, or allocate resources to subgroups. The query belongs to a single resource group and consumes resources from that […]