![]() ![]() Using the more common buffer tool instead of cpipe is likely possible as well. ![]() The information detailed below is available in an IBM article (available as a PDF or as a web page) titled Maximo NextGen REST API. Otherwise, you might get stuck with data in the buffers not being forwarded and waiting for a reply. This article will demonstrate how to query for data using the REST API that is found in Maximo 7.5.0.3 and higher, and the JSON API that is found in Maximo 7.6.0.2 and higher. It causes cpipe to read non-greedily from its input file-descriptor. Data from localhost:5000 is then put into the right cpipe command, which (with the given values) throttles it to about 300kB/s. That data is then forwarding using another socat which connects to localhost:5000 (where the service you want to slow down should be listening). option then throttles data that went into socket :5555 (and comes out of the first, outer socat) to at most 10kByte/s. Under Requests, change Source to Interceptor. In the Postman app, click the satellite icon to capture requests and cookies. Download Interceptor from the Chrome Web Store. The outer (left) socat listens with the given options on :5555 as a forking server. With Postman Interceptor, theres no need to use the deprecated Chrome extensionget the full features and functionality of Interceptor directly in the Postman app. Caveat: Note that this per-connection, so each individual TCP connection gets this amount. This simulates a connection with bandwidth of approximately 300kB/s from your service at :5000 and to at approximately 10kB/s and listens on :5555 for incoming connections. Socat TCP-LISTEN:5555,reuseaddr,reuseport,fork SYSTEM:'cpipe -ngr -b 1 -s 10 | socat - "TCP:localhost:5000" | cpipe -ngr -b 1 -s 300' ![]() It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions. One common case of shaping a single TCP connection can actually be assembled from dual pairs of socat and cpipe in UNIX fashion like this: RapidAPI for Mac (formerly Paw) is a full-featured HTTP client that lets you test and describe the APIs you build or consume. I have been using it to test the performance of an Android app on various emulated poor-performance networks. Or you can configure only a specific application to use that proxy. The advantage is that, as I wrote, it can emulate not only different network speeds but also, for example, the packet loss, duplication and/or corruption, random or defined delay, etc., so apart from the slow connections, you can also emulate various poorly performing networks and transmission errors.įor your application it's absolutely transparent, you can configure the operating system to use the NetEm as a proxy server, so all connections from that machine will be routed through it. It is controlled by the tc command-line application (from the iproute2 package), but there are also some web interface GUIs for NetEm, for example PHPnetemGUI2. It controls the networking using iproute2 package and it's enabled in the kernel of most Linux distributions. You can use NetEm (Network Emulation) as a proxy server to emulate many network characteristics (speed, delay, packet loss, etc.). ![]()
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