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couchdb3.r

REBOL [ Title: "CouchDB Client" Author: "Ingo Hohmann" Version: 0.0.11 Date: 2010-01-22 File: %couchdb3.r Needs: [2.100.96] Purpose: {Use couchdb as a datastore ( http://couchdb.apache.org/ )} Comments: { Api to access a CouchDB instance. - no special handling of login - no https - no error handling } library: [ level: 'intermediate platform: 'all type: [tool module] domain: [database http] tested-under: {R3 2.100.96.3.1, couchdb 0.10.0} support: none license: bsd see-also: none ] History: [ 0.0.1 - 0.0.10 "lost in time" 0.0.11 "update to json module 0.0.6" ] ] secure [debug allow] trace/back on ;do %json3.r json: module [ Title: "JSON to Rebol Converter" Name: 'json Version: 0.0.6 Type: 'module Exports: [json-to-rebol rebol-to-json] Comments: { The json.r script on rebol.org doesn't work on r3, and instead of trying to make it work, I thought, I'd just write a really basic json converter to play with. (My first version was abuot ten lines all in all). In the end, this is what happened. } History: [ 0.0.1 "first version trying to be complete" 0.0.2 "in work attach" 0.0.3 "in work view query" 0.0.4 "start of bulk api" 0.0.5 "error handling" 0.0.6 "rebol-to-json: nested objects, rebol-to-json: problem in escape-string" ] Todo: [ "string: handling of special characters" "Testing" "check, if all datatypes are handled correctly" "embedded objects in rebol" "error handling!" ] Done: [] ][ ;======== Helper Functions ======== to-isodate: funct [date [date!] /timestamp][ rejoin [date/year #"-" either date/month < 10 [#"0"][""] date/month #"-" either date/day < 10 [#"0"][""] date/day either timestamp [rejoin [#" " date/time #"+" date/zone]][""]] ] ;======= JSON to REBOL ========== object: [remove #"{" opt members spc remove #"}"] embedded-object: [change #"{" "#[object! [" opt members spc change #"}" "]]"] members: [ pair any [change #"," #" " members]] pair: [ spc name-string remove spc #":" insert #" " spc value] array: [#"[" spc opt elements spc #"]"] elements: [ value spc any [change #"," #" " spc value ]] value: [ string | number | embedded-object | array | vtrue | vfalse | vnull] vtrue: [change "true" "#[true]"] vfalse: [change "false" "#[false]"] vnull: [change "null" "#[none]"] string: [change #"^"" #"{" any chars change #"^"" #"}"] name-string: [remove #"^"" any chars remove #"^""] chars: [ any [char | change "{" "^{" | change "}" "^}" ;| change "^^" "^^^^" | remove #"\" [ #"^"" | #"\" | #"/" | change #"b" #"^H" | change #"f" #"^L" | change #"n" #"^/" | change #"r" #"^M" | change #"t" #"^-" ]]] char: complement charset {"\^{^}} hexdigit: charset [#"a" - #"f" #"A" - #"F" #"0" - #"1"] number: [int opt [frac | exp opt frac]] int: [ opt [#"-" | #"+"] some digit ] digit: charset [#"-" #"0" - #"9"] frac: [#"." some digit] exp: [ e some digit] e: [[#"e" | #"E"] opt [#"+" | #"-"]] space: charset " ^/^-" spc: [any space] json-to-rebol: func [ "Converts JSON String to Rebol object! / block!" json [string! binary!] /local type ][ if binary? json [json: to-string json] parse c: json [object (type: 'object)| array (type: 'array)] either 'object = type [ make object! load c ][ load c ] ] ;========== REBOL to JSON =========== json-string: none name: none o: none rebol-object: [(emit #"{") any [rname (emit #":") rvalue (emit #",")] (change back tail json-string #"}")] rebol-block: [(emit #"[") any [rvalue (emit #",")] (change back tail json-string #"]")] rname: [set name skip (emit mold form to-word name)] rvalue: [ rnumber | rstring | into rebol-block | set o object! (parse to-block o rebol-object) | robject | rnone | rtrue | rfalse | rfile | rdate | copy v skip (emit mold form v)] robject: [and change copy o object! (to-block o) into rebol-object] rnumber: [set v number! (emit v)] rnone: [none! (emit "null")] rtrue: [true (emit "true")] rfalse: [false (emit "false")] rfile: [ set v file! (emit mold json-escape-string to-local-file v)] rstring: [set v string! (emit json-escape-string v)] rblock: [and block! into [any rvalue]] rdate: [set v date! (emit mold to-isodate/timestamp v)] escape-table: [ {\\} "\" {\"} "^"" {\/} "/" {\>} ">" {\b} "^H" {\f} "^L" {\r} "^M" {\n} "^/" {\t} "^-" ] json-escape-string: func[s [string!]][ foreach [json rebol] escape-table [ replace/all s rebol json ] insert s {"} append s {"} s ] rebol-to-json: func [ "Converts Rebol object! to JSON String" val [object!] ;/local json-string ][ json-string: copy "" emit: func[v][append json-string v] if object? val [ val: copy/deep to-block val parse val rebol-object ] json-string ] ] couchdb: module [ Title: "CouchDB Client" Name: 'couchdb Version: 0.0.4 Type: 'module Author: "Ingo Hohmann" Exports: [] Todo: [ "work with views" "attachments" "bulk api" ] ][ url: none ; ---- Helpers write-db: func [ "Use write to send data to the database" url [url!] data ][ json/json-to-rebol write url data ] read-db: func[ "Use read to read data from the database" url [url!] ][ json/json-to-rebol read url ] payload: func [ "Wrap data into an object" data ][ make object! compose [data: (data)] ] ; ---- Database level api db-open: func [ "Open a database" db-url [url! word! string!] ][ either url? url [ url: dirize db-url ][ url: join http://localhost:5984/ form db-url ] read-db url ] db-create: func [ "Create a new database" db [url! string! word!] /local parts base-url ][ if not url? db [db: join first split-path url db] write-db db [PUT] ] db-delete: func [ "Delete a database" db [url! string! word!] /local parts base-url ][ if not url? db [db: join first split-path url db] write-db db [DELETE] ] db-info: func[ "Return Database META-information" ][ read-db url ] db-changes: func [ "Return database changes information" /since seq ][ my-url: rejoin [url "_changes" either since [join "?since=" seq][""]] read-db my-url ] db-compact: func [][ write-db url/_compact "" ] ; ------ helper functions -------- uuid: func [ "Get a UUID from the server" /local server-url answer ][ server-url: first split-path url answer: read-db server-url/_uuids answer/uuids/1 ] ; -------- Server API server: func [ "read arbitrary data from server" path [file! string!] /local server-url response ][ server-url: first split-path url read-db server-url/:path ] replicate: func [ "Replicate databases" source-db target-db /continuous-replication /create-target-db /local request ][ request: make object! [source: source-db target: target-db] if continuous-replication [extend request 'continuous true] if create-target-db [extend request 'create-target true] write-db join first split-path url "_replicate" json/rebol-to-json request ] ; -------- Document API ----------- ; Single Document API get: func [ "Get a single document by id, does not consider conflicts" id [word! string!] ][ read-db url/:id ] post: func [ "Save a document, returns error if conflicting" data [object! string!] ][ either object? data [ write-db url json/rebol-to-json data ][ write-db url data ] ] copy-doc: func [ "Copy a document" id [word! string!] to [word! string!] /local parts ][ write-db url/:id compose/deep [COPY [Destination: (to)] ""] ] ; bulk document API doc: func [ "Get a single document and all conflicting revisions by id" id [word! string!] /save ][ read-db join url/:id '?open_revs=all ] save-doc: func [ "Save a single document, possibly creating conflicts" data [object! string!] /local template ][ template: json/rebol-to-json make object! [ all_or_nothing: true docs: either object? data [probe json/rebol-to-json data][data] ] data: rejoin [ {^{"all_or_nothing":true,"docs":[} ;} either object? data [json/rebol-to-json data][data] "]}" ] write-db url/_bulk_docs data ] save-bulk: func [ "Save a block of documents, possibly creating conflicts" data [block!] "block of rebol objects" ;/noconflict "do not create confliciting documents" /local template ][ template: json/rebol-to-json make object! [ all_or_nothing: true docs: either object? data [json/rebol-to-json data][data] ] data: rejoin [ {^{"all_or_nothing":true,"docs":[} ;} either object? data [json/rebol-to-json data][data] "]}" ] write-db url/_bulk_docs data ] ; ------- Other document functions view: func [ "query a view" design "design name" view "view name" /key "to get a single document by key-value" key-value /range "to get a range of documents" start-value [string!] end-value [string!] /local my-url ][ assert [not all [key range] any [key range] "exactly 1 of key / range needs to be set"] my-url: url/_design/:design/_view/:view either key [ my-url: rejoin [my-url "?key=" mold key-value] ][ if range [my-url: rejoin [my-url "?startkey=" mold start-value "&endkey=" mold end-value]] ] read-db my-url ] update-doc: funct [ "to update design documents, etc ..." id json-data [object!] /local olddoc data ][ olddoc: get id data: json/json-to-rebol json-data extend data '_rev olddoc/_rev post data ] attach: funct [ "Add an attachment to document with id: id" id [string!] "document ID to attach to" attachment-name "Name the attachment" data [string! binary! file!] "Data to attach" /rev revision /get-rev "get revision of current document" /type mime-type "set mimetype if attachment (defaults to text/plain)" /local parts dummy ][ if get-rev [ dummy: get id revision: dummy/_rev rev: true ] parts: decode-url url default mime-type "text/plain" if file? data [data: read data] my-url: rejoin [url id "/" attachment-name either rev [join "?rev=" revision][""]] write-db my-url compose/deep [PUT [Content-Type: (mime-type)] (data)] ] ] test: func [ testcase][ print [newline "===>" testcase] probe try [do testcase] ] tests: [ test [couchdb/db-create http://localhost:5984/hoh_test_db] test [couchdb/db-open http://localhost:5984/hoh_test_db] test [couchdb/post payload "Dies ist ein Test"] test [couchdb/post make object! [_id: "test" data: "Noch ein Test"]] test [couchdb/attach "test2" "attachment" "Test-string" ] test [couchdb/attach/get-rev "test2" "attachment" "Test-string 2" ] test [couchdb/db-delete "hoh_test_db"] ;test [couchdb/db-open http://localhost:8200/db2] ;test [rtj json-to-rebol to-string read http://localhost:5984/db2/3 ] ;test [json-to-rebol to-string read http://localhost:5984/db2/3 ] ;test [rebol-to-json json-to-rebol to-string read http://localhost:5984/db2/3 ] ;test [x: couchdb/get "3"] ;test [v: couchdb/get "_design/example/_view/foo"] ;test [couchdb/view 'example 'foo] ;test [couchdb/view/key 'example 'foo "3"] ;test [couchdb/view/range 'example 'foo "3" "4"] ;test [couchdb/update-doc "_design/example" to-string read %design.json] ;test [couchdb/attach "9" "attachment" "Test-string" ] ;test [couchdb/attach/get-rev "13" "attachment" "Test-string" ] ;test [x: couchdb/doc "3"] ;test [x: couchdb/get "3"] ;x/data: join "x" x/data ;test [couchdb/save-doc x] ;x/data: join "x" x/data ;test [couchdb/save-doc x] ;test [couchdb/copy-doc "3" "test3"] ;test [json/rebol-to-json make object! [date: now]] ] ;do tests tests-json: [ test [json/rebol-to-json probe make object! [ob: make object! [b: 1 c: 2] b: [1 2]]] test [json/rebol-to-json make object! [a: [1 2 3]]] ] ;do tests-json 'done
halt ;; to terminate script if DO'ne from webpage