Then one day I tried to use it with curl and it didn’t work. This is what I usually do, but in this case I thought I didn’t need to do it because the function was working, because I was only calling it with requests. Oh well… I have control on the http endpoint, so I will parse the body. They all can create a text file and execute it with cmd /c, but some of them don’t know how to send http requests. I would like a unique way to send a request from any scripting language that runs inside other CAD, CAM or other proprietary applications. I didn’t know httpie, it looks cool, but I was looking for something that works on Windows machines out of the box. 91fd2c69ff2f3bacĬontent-Disposition: form-data name="what" I would consider that to be a problem due to underspecification.Using -F sends this, I guess that’s what RFC 2388 likes, but it is not what Anvil likes: -91fd2c69ff2f3bacĬontent-Disposition: form-data name="who" If you have only few key-value pair then a normal POST parameter with key1value1, key2value2, etc is probably enough, but once your data is more complex and especially containing complex structure (nested object, arrays) you would want to start consider using JSON. The only difference is how you process it in the server. In particular, integers beyond JavaScript's Number.MAX_SAFE_INTEGER (2^53 - 1) should be considered unsafe in a JSON document.Īnother result is that no real-world JSON representation can round-trip “correctly”: instead of treating numbers as “a sequence of digits” they might convert them to a float64, in which case a JSON → data model → JSON roundtrip might result in a different document. In principal, they are both just transmitting data. The result is that sane programs – that don't want to be at the mercy of whatever JSON implementation processes the document – might encode large integers as strings. A JSON number could validly describe a 1000-bit integer, but no reasonable implementation would be able to decode this. You can use -json, -j to explicitly set Accept to application/json regardless of whether you are sending data (it’s a shortcut for setting the header via the usual header notation: http url Accept:application/json, / q0. ![]() If an implementation decodes an integer value as a float, this might lose precision. * JSON doesn't have separate representation for ints and floats. * Float values like Infinity or NaN cannot be represented. That is enough to allow interchange.īut can you encode/decode an arbitrary integer or a float? Probably not! JSON instead offers only the representation of numbers that humans use: a sequence of digits. > JSON is agnostic about the semantics of numbers. The standard euphemistically describes this as: They can have a sign, decimal part, and an exponent. Or something could be added for convenient handling of bash arrays. For example the Python-style `%(env_var)s` sequences could be used which could expand environment variables directly. I've used a printf style format string here, which could be expanded for extra convenience. %s is invalid JSON anyway, so you can do a string substitution - all you need to keep track of are matching quotes (including escape sequences). Curl doesn't actually need to parse (nor validate) the JSON, or to create a tree representation of the data within itself. What's on the command line resembles what's actually going to be sent.Ģ. One alternative would be to provide escaping more directly like this:Īnd then curl would do the substitution with the appropriate type-specific escaping for each variable. It seems the goal is to make it easier to craft JSON by having curl perform escaping, while the proposal would seem to require some sort of in-memory tree representation of the data. I write many single purpose utilties for own use, including one that replaces the "post" shell script in this comment. large scripting language interpreters and/or other large binaries, is in short supply and 2. For example for POSTing a JSON object you simply call: http localhost:8000. Printf "%s\r\n\r\n%s\r\n" "$y: close" "$x" fi īased on personal experience as an end user, I find that using separate utilities is faster and more flexible than curl or similar program mentioned in this thread. Send JSON data stored in a file: http POST /person/1 < person.json. HTTPie is a command line HTTP client written in Python. "Content-Type: application/x-www-form-urlencoded" \ POST - HTTP MDN - Mozilla Developer Execute HTTP POST Request with JSON Content in Objective-C Creating an application/json HTTP POST httpie post json. It is smaller and faster, IME as a non-developer. It is widely used to transfer data from the server to the client, the client to the server, and the server to the server. JSON is a text-based data format used to store and convey information. There is a different way, without curl or other curl-like programs, without Python, Go, or the like. JSON is an abbreviation for Javascript Object Notation.
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