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Improve JSON API documentation

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Gioacchino Mazzurco 2018-08-25 22:25:36 +02:00
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jsonapi-generator/README.adoc
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@ -112,17 +112,77 @@ struct RsGxsChannelGroup : RsSerializable
{
RS_SERIAL_PROCESS(mMeta);
RS_SERIAL_PROCESS(mDescription);
//RS_SERIAL_PROCESS(mImage);
RS_SERIAL_PROCESS(mImage);
RS_SERIAL_PROCESS(mAutoDownload);
}
};
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You can do the same recursively for any member of your +struct+ that is not yet
supported by +RsTypeSerializer+ like I should have done for +RsGxsImage mImage;+
but didn't have done yet because the day is so beatiful and i want to spend some
time outside :D.
supported by +RsTypeSerializer+.
Some Retroshare {Cxx} API functions are asyncronous, historically RetroShare
didn't follow a policy on how to expose asyncronous API so differents services
and some times even differents method of the same service follow differents
asyncronous patterns, thus making automatic generation of JSON API wrappers for
those methods impractical. Instead of dealing with all those differents patterns
I have chosed to support only one new pattern taking advantage of modern {Cxx}11
and restbed features. On the {Cxx}11 side lambdas and +std::function+s are used,
on the restbed side Server Side Events are used to send asyncronous results.
Lets see an example so it will be much esier to understand.
.RsGxsChannels::turtleSearchRequest asyncronous API
[source,cpp]
--------------------------------------------------------------------------------
/**
* @brief Request remote channels search
* @jsonapi{development}
* @param[in] matchString string to look for in the search
* @param multiCallback function that will be called each time a search
* result is received
* @param[in] maxWait maximum wait time in seconds for search results
* @return false on error, true otherwise
*/
virtual bool turtleSearchRequest(
const std::string& matchString,
const std::function<void (const RsGxsGroupSummary& result)>& multiCallback,
std::time_t maxWait = 300 ) = 0;
--------------------------------------------------------------------------------
+RsGxsChannels::turtleSearchRequest(...)+ is an asyncronous method because it
send a channel search request on turtle network and then everytime a result is
received from the network +multiCallback+ is called and the result is passed as
parameter. To be supported by the automatic JSON API wrappers generator an
asyncronous method need a parameter of type +std::function<void (...)>+ called
+callback+ if the callback will be called only once or +multiCallback+ if the
callback is expected to be called more then once like in this case.
A second mandatory parameter is +maxWait+ of type +std::time_t+ it indicates the
maximum amount of time in seconds for which the caller is willing to wait for
results, in case the timeout is reached the callback will not be called anymore.
[IMPORTANT]
================================================================================
+callback+ and +multiCallback+ parameters documentation must *not* specify
+[in]+, +[out]+, +[inout]+, in Doxygen documentation as this would fool the
automatic wrapper generator, and ultimately break the compilation.
================================================================================
.RsFiles::turtleSearchRequest asyncronous JSON API usage example
[source,bash]
--------------------------------------------------------------------------------
$ cat turtle_search.json
{
"matchString":"linux"
}
$ curl --data @turtle_search.json http://127.0.0.1:9092/rsFiles/turtleSearchRequest
data: {"retval":true}
data: {"results":[{"size":157631,"hash":"69709b4d01025584a8def5cd78ebbd1a3cf3fd05","name":"kill_bill_linux_1024x768.jpg"},{"size":192560,"hash":"000000000000000000009a93e5be8486c496f46c","name":"coffee_box_linux2.jpg"},{"size":455087,"hash":"9a93e5be8486c496f46c00000000000000000000","name":"Linux.png"},{"size":182004,"hash":"e8845280912ebf3779e400000000000000000000","name":"Linux_2_6.png"}]}
data: {"results":[{"size":668,"hash":"e8845280912ebf3779e400000000000000000000","name":"linux.png"},{"size":70,"hash":"e8845280912ebf3779e400000000000000000000","name":"kali-linux-2016.2-amd64.txt.sha1sum"},{"size":3076767744,"hash":"e8845280912ebf3779e400000000000000000000","name":"kali-linux-2016.2-amd64.iso"},{"size":2780872,"hash":"e8845280912ebf3779e400000000000000000000","name":"openwrt-ar71xx-generic-vmlinux.bin"},{"size":917504,"hash":"e8845280912ebf3779e400000000000000000000","name":"openwrt-ar71xx-generic-vmlinux.lzma"},{"size":2278404096,"hash":"e8845280912ebf3779e400000000000000000000","name":"gentoo-linux-livedvd-amd64-multilib-20160704.iso"},{"size":151770333,"hash":"e8845280912ebf3779e400000000000000000000","name":"flashtool-0.9.23.0-linux.tar.7z"},{"size":2847372,"hash":"e8845280912ebf3779e400000000000000000000","name":"openwrt-ar71xx-generic-vmlinux.elf"},{"size":1310720,"hash":"e8845280912ebf3779e400000000000000000000","name":"openwrt-ar71xx-generic-vmlinux.gz"},{"size":987809,"hash":"e8845280912ebf3779e400000000000000000000","name":"openwrt-ar71xx-generic-vmlinux-lzma.elf"}]}
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== A bit of history