src/litestorepkg/lib/api_v8.nim
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import
asynchttpserver,
strutils,
sequtils,
cgi,
strtabs,
pegs,
json,
os,
uri,
tables,
times
import
types,
contenttypes,
core,
utils,
logger,
duktape
# Helper procs
proc sqlOp(op: string): string =
let table = newStringTable()
table["not eq"] = "<>"
table["eq"] = "=="
table["gt"] = ">"
table["gte"] = ">="
table["lt"] = "<"
table["lte"] = "<="
table["contains"] = "contains"
table["like"] = "like"
return table[op]
proc orderByClauses*(str: string): string =
var clauses = newSeq[string]()
var fragments = str.split(",")
let clause = peg"""
clause <- {[-+]} {field}
field <- ('id' / 'created' / 'modified' / path)
path <- '$' (objField)+
ident <- [a-zA-Z0-9_]+
objField <- '.' ident
"""
for f in fragments:
var matches = @["", ""]
if f.find(clause, matches) != -1:
var field = matches[1]
if field[0] == '$':
field = "json_extract(documents.data, '$1')" % matches[1]
if matches[0] == "-":
clauses.add("$1 COLLATE NOCASE DESC" % field)
else:
clauses.add("$1 COLLATE NOCASE ASC" % field)
return clauses.join(", ")
proc selectClause*(str: string, options: var QueryOptions) =
let tokens = """
path <- '$' (objItem / objField)+
ident <- [a-zA-Z0-9_]+
objIndex <- '[' \d+ ']'
objField <- '.' ident
objItem <- objField objIndex
"""
let fields = peg("""
fields <- ^{field} (\s* ',' \s* {field})*$
field <- path \s+ ('as' / 'AS') \s+ ident
""" & tokens)
let field = peg("""
field <- ^{path} \s+ ('as' / 'AS') \s+ {ident}$
""" & tokens)
var fieldMatches = newSeq[string](10)
if str.strip.match(fields, fieldMatches):
for m in fieldMatches:
if m.len > 0:
var rawTuple = newSeq[string](2)
if m.match(field, rawTuple):
options.jsonSelect.add((path: rawTuple[0], alias: rawTuple[1]))
proc filterClauses*(str: string, options: var QueryOptions) =
let tokens = """
operator <- 'not eq' / 'eq' / 'gte' / 'gt' / 'lte' / 'lt' / 'contains' / 'like'
value <- string / number / 'null' / 'true' / 'false'
string <- '"' ('\\"' . / [^"])* '"'
number <- '-'? '0' / [1-9] [0-9]* ('.' [0-9]+)? (( 'e' / 'E' ) ( '+' / '-' )? [0-9]+)?
path <- '$' (objItem / objField)+
ident <- [a-zA-Z0-9_]+
objIndex <- '[' \d+ ']'
objField <- '.' ident
objItem <- objField objIndex
"""
let clause = peg("""
clause <- {path} \s+ {operator} \s+ {value}
""" & tokens)
let andClauses = peg("""
andClauses <- ^{clause} (\s+ 'and' \s+ {clause})*$
clause <- path \s+ operator \s+ value
""" & tokens)
let orClauses = peg("""
orClauses <- ^{andClauses} (\s+ 'or' \s+ {andClauses})*$
andClauses <- clause (\s+ 'and' \s+ clause)*
clause <- path \s+ operator \s+ value
""" & tokens)
var orClausesMatches = newSeq[string](10)
discard str.strip.match(orClauses, orClausesMatches)
var parsedClauses = newSeq[seq[seq[string]]]()
for orClause in orClausesMatches:
if orClause.len > 0:
var andClausesMatches = newSeq[string](10)
discard orClause.strip.match(andClauses, andClausesMatches)
var parsedAndClauses = newSeq[seq[string]]()
for andClause in andClausesMatches:
if andClause.len > 0:
var clauses = newSeq[string](3)
discard andClause.strip.match(clause, clauses)
clauses[1] = sqlOp(clauses[1])
if clauses[2] == "true":
clauses[2] = "1"
elif clauses[2] == "false":
clauses[2] = "0"
parsedAndClauses.add clauses
if parsedAndClauses.len > 0:
parsedClauses.add parsedAndClauses
if parsedClauses.len == 0:
return
var currentArr = 0
var tables = newSeq[string]()
let resOrClauses = parsedClauses.map do (it: seq[seq[string]]) -> string:
let resAndClauses = it.map do (x: seq[string]) -> string:
if x[1] == "contains":
currentArr = currentArr + 1
tables.add "json_each(documents.data, '$1') AS arr$2" % [x[0], $currentArr]
return "arr$1.value == $2" % [$currentArr, x[2]]
else:
var arr = @[x[0], x[1], x[2]]
if x[1] == "like":
arr[2] = x[2].replace('*', '%')
return "json_extract(documents.data, '$1') $2 $3 " % arr
return resAndClauses.join(" AND ")
options.tables = options.tables & tables
options.jsonFilter = resOrClauses.join(" OR ")
proc parseQueryOption*(fragment: string, options: var QueryOptions) =
if fragment == "":
return
var pair = fragment.split('=')
if pair.len < 2 or pair[1] == "":
raise newException(EInvalidRequest, "Invalid query string fragment '$1'" % fragment)
try:
pair[1] = pair[1].replace("+", "%2B").decodeURL
except CatchableError:
raise newException(EInvalidRequest, "Unable to decode query string fragment '$1'" % fragment)
case pair[0]:
of "filter":
filterClauses(pair[1], options)
if options.jsonFilter == "":
raise newException(EInvalidRequest, "Invalid filter clause: $1" % pair[1].replace("\"", "\\\""))
of "select":
selectClause(pair[1], options)
if options.jsonSelect.len == 0:
raise newException(EInvalidRequest, "Invalid select clause: $1" % pair[1].replace("\"", "\\\""))
of "like":
options.like = pair[1]
of "search":
options.search = pair[1]
of "tags":
options.tags = pair[1]
of "created-after":
try:
options.createdAfter = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'")
except CatchableError:
raise newException(EInvalidRequest, "Invalid created-after value: $1" % getCurrentExceptionMsg())
of "created-before":
try:
options.createdBefore = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'")
except CatchableError:
raise newException(EInvalidRequest, "Invalid created-before value: $1" % getCurrentExceptionMsg())
of "modified-after":
try:
options.modifiedAfter = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'")
except CatchableError:
raise newException(EInvalidRequest, "Invalid modified.after value: $1" % getCurrentExceptionMsg())
of "modified-before":
try:
options.modifiedBefore = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'")
except CatchableError:
raise newException(EInvalidRequest, "Invalid modified-before value: $1" % getCurrentExceptionMsg())
of "limit":
try:
options.limit = pair[1].parseInt
except CatchableError:
raise newException(EInvalidRequest, "Invalid limit value: $1" % getCurrentExceptionMsg())
of "offset":
try:
options.offset = pair[1].parseInt
except CatchableError:
raise newException(EInvalidRequest, "Invalid offset value: $1" % getCurrentExceptionMsg())
of "sort":
let orderby = pair[1].orderByClauses()
if orderby != "":
options.orderby = orderby
else:
raise newException(EInvalidRequest, "Invalid sort value: $1" % pair[1])
of "contents", "raw":
discard
else:
discard
proc parseQueryOptions*(querystring: string, options: var QueryOptions) =
var q = querystring
if q.startsWith("?"):
q = q[1 .. q.len - 1]
var fragments = q.split('&')
for f in fragments:
f.parseQueryOption(options)
proc validate*(req: LSRequest, LS: LiteStore, resource: string, id: string, cb: proc(req: LSRequest, LS: LiteStore, resource: string, id: string):LSResponse): LSResponse =
if req.reqMethod == HttpPost or req.reqMethod == HttpPut or req.reqMethod == HttpPatch:
var ct = ""
let body = req.body.strip
if body == "":
return resError(Http400, "Bad request: No content specified for document.")
if req.headers.hasKey("Content-Type"):
ct = req.headers["Content-Type"]
case ct:
of "application/json":
try:
discard body.parseJson()
except CatchableError:
return resError(Http400, "Invalid JSON content - $1" % getCurrentExceptionMsg())
else:
discard
return cb(req, LS, resource, id)
proc patchTag(tags: var seq[string], index: int, op, path, value: string): bool =
LOG.debug("- PATCH -> $1 tag['$2'] = \"$3\" - Total tags: $4." % [op, $index, $value, $tags.len])
case op:
of "remove":
let tag = tags[index]
if not tag.startsWith("$"):
tags[index] = "" # Not removing element, otherwise subsequent indexes won't work!
else:
raise newException(EInvalidRequest, "cannot remove system tag: $1" % tag)
of "add":
if value.match(PEG_USER_TAG):
tags.insert(value, index)
else:
if value.strip == "":
raise newException(EInvalidRequest, "tag not specified." % value)
else:
raise newException(EInvalidRequest, "invalid tag: $1" % value)
of "replace":
if value.match(PEG_USER_TAG):
if tags[index].startsWith("$"):
raise newException(EInvalidRequest, "cannot replace system tag: $1" % tags[index])
else:
tags[index] = value
else:
if value.strip == "":
raise newException(EInvalidRequest, "tag not specified." % value)
else:
raise newException(EInvalidRequest, "invalid tag: $1" % value)
of "test":
if tags[index] != value:
return false
else:
raise newException(EInvalidRequest, "invalid patch operation: $1" % op)
return true
proc patchData*(data: var JsonNode, origData: JsonNode, op: string, path: string, value: JsonNode): bool =
LOG.debug("- PATCH -> $1 path $2 with $3" % [op, path, $value])
var keys = path.replace(peg"^\/data\/", "").split("/")
if keys.len == 0:
raise newException(EInvalidRequest, "no valid path specified: $1" % path)
var d = data
var dorig = origData
var c = 1
for key in keys:
if d.kind == JArray:
try:
var index = key.parseInt
if c >= keys.len:
d.elems[index] = value
case op:
of "remove":
d.elems.del(index)
of "add":
d.elems.insert(value, index)
of "replace":
d.elems[index] = value
of "test":
if d.elems[index] != value:
return false
else:
raise newException(EInvalidRequest, "invalid patch operation: $1" % op)
else:
d = d[index]
dorig = dorig[index]
except CatchableError:
raise newException(EInvalidRequest, "invalid index key '$1' in path '$2'" % [key, path])
else:
if c >= keys.len:
case op:
of "remove":
if d.hasKey(key):
d.delete(key)
else:
raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path])
of "add":
d[key] = value
of "replace":
if d.hasKey(key):
d[key] = value
else:
raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path])
of "test":
if dorig.hasKey(key):
if dorig[key] != value:
return false
else:
raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path])
else:
raise newException(EInvalidRequest, "invalid patch operation: $1" % op)
else:
d = d[key]
dorig = dorig[key]
c += 1
return true
proc applyPatchOperation*(data: var JsonNode, origData: JsonNode, tags: var seq[string], op: string, path: string, value: JsonNode): bool =
var matches = @[""]
let p = peg"""
path <- ^tagPath / fieldPath$
tagPath <- '\/tags\/' {\d+}
fieldPath <- '\/data\/' ident ('\/' ident)*
ident <- [a-zA-Z0-9_]+ / '-'
"""
if path.find(p, matches) == -1:
raise newException(EInvalidRequest, "cannot patch path '$1'" % path)
if path.match(peg"^\/tags\/"):
let index = matches[0].parseInt
if value.kind != JString:
raise newException(EInvalidRequest, "tag '$1' is not a string." % $value)
let tag = value.getStr
return patchTag(tags, index, op, path, tag)
elif tags.contains("$subtype:json"):
return patchData(data, origData, op, path, value)
else:
raise newException(EInvalidRequest, "cannot patch data of a non-JSON document.")
# Low level procs
proc getTag*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse =
let doc = LS.store.retrieveTag(id, options)
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
if doc == newJNull():
result = resTagNotFound(id)
else:
result.content = $doc
result.code = Http200
proc getStore*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse =
if (not LSDICT.hasKey(id)):
return resStoreNotFound(id)
let store = LSDICT[id]
var doc = newJObject()
doc["id"] = %id
doc["file"] = %store.file
doc["config"] = store.config
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = $doc
result.code = Http200
proc getIndex*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse =
let doc = LS.store.retrieveIndex(id, options)
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
if doc == newJNull():
result = resIndexNotFound(id)
else:
result.content = $doc
result.code = Http200
proc getRawDocument*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse =
let doc = LS.store.retrieveRawDocument(id, options)
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
if doc == "":
result = resDocumentNotFound(id)
else:
result.content = doc
result.code = Http200
proc getDocument*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse =
let doc = LS.store.retrieveDocument(id, options)
if doc.data == "":
result = resDocumentNotFound(id)
else:
result.headers = doc.contenttype.ctHeader
setOrigin(LS, req, result.headers)
result.content = doc.data
result.code = Http200
proc deleteDocument*(LS: LiteStore, id: string, req: LSRequest): LSResponse =
let doc = LS.store.retrieveDocument(id)
if doc.data == "":
result = resDocumentNotFound(id)
else:
try:
let res = LS.store.destroyDocument(id)
if res == 0:
result = resError(Http500, "Unable to delete document '$1'" % id)
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Content-Length"] = "0"
result.content = ""
result.code = Http204
except CatchableError:
result = resError(Http500, "Unable to delete document '$1'" % id)
proc getTags*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse =
var options = options
let t0 = cpuTime()
let docs = LS.store.retrieveTags(options)
let orig_limit = options.limit
let orig_offset = options.offset
options.limit = 0
options.offset = 0
options.select = @["COUNT(tag_id)"]
let total = LS.store.countTags(prepareSelectTagsQuery(options), options.like.replace("*", "%"))
var content = newJObject()
if options.like != "":
content["like"] = %(options.like.decodeURL)
if orig_limit > 0:
content["limit"] = %orig_limit
if orig_offset > 0:
content["offset"] = %orig_offset
content["total"] = %total
content["execution_time"] = %(cputime()-t0)
content["results"] = docs
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = content.pretty
result.code = Http200
proc getStores(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse =
let t0 = cpuTime()
var docs = newJArray()
for k, v in LSDICT.pairs:
var store = newJObject()
store["id"] = %k
store["file"] = %v.file
store["config"] = v.config
docs.add(store)
var content = newJObject()
content["total"] = %LSDICT.len
content["execution_time"] = %(cputime()-t0)
content["results"] = docs
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = content.pretty
result.code = Http200
proc getIndexes*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse =
var options = options
let t0 = cpuTime()
let docs = LS.store.retrieveIndexes(options)
let orig_limit = options.limit
let orig_offset = options.offset
options.limit = 0
options.offset = 0
options.select = @["COUNT(name)"]
let total = LS.store.countIndexes(prepareSelectIndexesQuery(options), options.like.replace("*", "%"))
var content = newJObject()
if options.like != "":
content["like"] = %(options.like.decodeURL)
if orig_limit > 0:
content["limit"] = %orig_limit
if orig_offset > 0:
content["offset"] = %orig_offset
content["total"] = %total
content["execution_time"] = %(cputime()-t0)
content["results"] = docs
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = content.pretty
result.code = Http200
proc getRawDocuments*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse =
var options = options
let t0 = cpuTime()
let docs = LS.store.retrieveRawDocuments(options)
let orig_limit = options.limit
let orig_offset = options.offset
options.limit = 0
options.offset = 0
options.select = @["COUNT(docid)"]
let total = LS.store.retrieveRawDocuments(options)[0].num
var content = newJObject()
if options.folder != "":
content["folder"] = %(options.folder)
if options.search != "":
content["search"] = %(options.search.decodeURL)
if options.tags != "":
content["tags"] = newJArray()
for tag in options.tags.replace("+", "%2B").decodeURL.split(","):
content["tags"].add(%tag)
if orig_limit > 0:
content["limit"] = %orig_limit
if orig_offset > 0:
content["offset"] = %orig_offset
if options.orderby != "":
content["sort"] = %options.orderby
content["total"] = %total
content["execution_time"] = %(cputime()-t0)
content["results"] = docs
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = content.pretty
result.code = Http200
proc getInfo*(LS: LiteStore, req: LSRequest): LSResponse =
let info = LS.store.retrieveInfo()
let version = info[0]
let total_documents = info[1]
let total_tags = LS.store.countTags()
let tags = LS.store.retrieveTagsWithTotals()
var content = newJObject()
content["version"] = %(LS.appname & " v" & LS.appversion)
content["datastore_version"] = %version
content["api_version"] = %7
content["size"] = %($((LS.file.getFileSize().float/(1024*1024)).formatFloat(ffDecimal, 2)) & " MB")
content["read_only"] = %LS.readonly
content["log_level"] = %LS.loglevel
if LS.directory.len == 0:
content["directory"] = newJNull()
else:
content["directory"] = %LS.directory
content["mount"] = %LS.mount
if LS.config != newJNull() and LS.config.hasKey("stores") and LS.config["stores"].len > 0:
content["additional_stores"] = %toSeq(LS.config["stores"].keys)
else:
content["additional_stores"] = newJArray()
if LS.auth != newJNull():
content["auth"] = %true
else:
content["auth"] = %false
content["total_documents"] = %total_documents
content["total_tags"] = %total_tags
content["tags"] = tags
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = content.pretty
result.code = Http200
proc putIndex*(LS: LiteStore, id, field: string, req: LSRequest): LSResponse =
try:
if (not id.match(PEG_INDEX)):
return resError(Http400, "invalid index ID: $1" % id)
if (not field.match(PEG_JSON_FIELD)):
return resError(Http400, "invalid field path: $1" % field)
if (LS.store.retrieveIndex(id) != newJNull()):
return resError(Http409, "Index already exists: $1" % id)
LS.store.createIndex(id, field)
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = "{\"id\": \"$1\", \"field\": \"$2\"}" % [id, field]
result.code = Http201
except CatchableError:
eWarn()
result = resError(Http500, "Unable to create index.")
proc putStore*(LS: LiteStore, id: string, config: JsonNode, req: LSRequest): LSResponse =
try:
if (not id.match(PEG_STORE) or id == "master"):
return resError(Http400, "invalid store ID: $1" % id)
if (LSDICT.hasKey(id)):
return resError(Http409, "Store already exists: $1" % id)
let store = LS.addStore(id, id & ".db", config)
LS.updateConfig()
LSDICT[id] = store
result = getStore(LS, id, newQueryOptions(), req)
result.code = Http201
except CatchableError:
eWarn()
result = resError(Http500, "Unable to create store.")
proc deleteIndex*(LS: LiteStore, id: string, req: LSRequest): LSResponse =
if (not id.match(PEG_INDEX)):
return resError(Http400, "invalid index ID: $1" % id)
if (LS.store.retrieveIndex(id) == newJNull()):
return resError(Http404, "Index not found: $1" % id)
try:
LS.store.dropIndex(id)
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Content-Length"] = "0"
result.content = ""
result.code = Http204
except CatchableError:
eWarn()
result = resError(Http500, "Unable to delete index.")
proc deleteStore*(LS: LiteStore, id: string, req: LSRequest): LSResponse =
if (not id.match(PEG_STORE)):
return resError(Http400, "invalid store ID: $1" % id)
if (not LSDICT.hasKey(id)):
return resError(Http404, "Store not found: $1" % id)
try:
LSDICT.del(id)
if LS.config.hasKey("stores") and LS.config["stores"].hasKey(id):
LS.config["stores"].delete(id)
LS.updateConfig()
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Content-Length"] = "0"
result.content = ""
result.code = Http204
except CatchableError:
eWarn()
result = resError(Http500, "Unable to delete index.")
proc postDocument*(LS: LiteStore, body: string, ct: string, folder="", req: LSRequest): LSResponse =
if not folder.isFolder:
return resError(Http400, "Invalid folder specified when creating document: $1" % folder)
try:
var doc = LS.store.createDocument(folder, body, ct)
if doc != "":
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = doc
result.code = Http201
else:
result = resError(Http500, "Unable to create document.")
except CatchableError:
eWarn()
result = resError(Http500, "Unable to create document.")
proc putDocument*(LS: LiteStore, id: string, body: string, ct: string, req: LSRequest): LSResponse =
if id.isFolder:
return resError(Http400, "Invalid ID '$1' (Document IDs cannot end with '/')." % id)
let doc = LS.store.retrieveDocument(id)
if doc.data == "":
# Create a new document
var doc = LS.store.createDocument(id, body, ct)
if doc != "":
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = doc
result.code = Http201
else:
result = resError(Http500, "Unable to create document.")
else:
# Update existing document
try:
var doc = LS.store.updateDocument(id, body, ct)
if doc != "":
result.headers = ctJsonHeader()
setOrigin(LS, req, result.headers)
result.content = doc
result.code = Http200
else:
result = resError(Http500, "Unable to update document '$1'." % id)
except CatchableError:
result = resError(Http500, "Unable to update document '$1'." % id)
proc patchDocument*(LS: LiteStore, id: string, body: string, req: LSRequest): LSResponse =
var apply = true
let jbody = body.parseJson
if jbody.kind != JArray:
return resError(Http400, "Bad request: PATCH request body is not an array.")
var options = newQueryOptions()
options.select = @["documents.id AS id", "created", "modified", "data"]
let doc = LS.store.retrieveRawDocument(id, options)
if doc == "":
return resDocumentNotFound(id)
let jdoc = doc.parseJson
var tags = newSeq[string]()
var origTags = newSeq[string]()
for tag in jdoc["tags"].items:
tags.add(tag.str)
origTags.add(tag.str)
var data: JsonNode
var origData: JsonNode
if tags.contains("$subtype:json"):
try:
origData = jdoc["data"].getStr.parseJson
data = origData.copy
except CatchableError:
discard
var c = 1
for item in jbody.items:
if item.hasKey("op") and item.hasKey("path"):
if not item.hasKey("value"):
item["value"] = %""
try:
apply = applyPatchOperation(data, origData, tags, item["op"].str, item["path"].str, item["value"])
if not apply:
break
except CatchableError:
return resError(Http400, "Bad request - $1" % getCurrentExceptionMsg())
else:
return resError(Http400, "Bad request: patch operation #$1 is malformed." % $c)
c.inc
if apply:
# when document is not JSON the origData is not defined
# the extra check allows editing tags for non-JSON documents
if origData != nil and origData.len > 0 and origData != data:
try:
var doc = LS.store.updateDocument(id, data.pretty, "application/json")
if doc == "":
return resError(Http500, "Unable to patch document '$1'." % id)
except CatchableError:
return resError(Http500, "Unable to patch document '$1' - $2" % id, getCurrentExceptionMsg())
if origTags != tags:
try:
for t1 in jdoc["tags"].items:
discard LS.store.destroyTag(t1.str, id, true)
for t2 in tags:
if t2 != "":
LS.store.createTag(t2, id, true)
except CatchableError:
return resError(Http500, "Unable to patch document '$1' - $2" % [id, getCurrentExceptionMsg()])
return LS.getRawDocument(id, newQueryOptions(), req)
# Main routing
proc options*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
case resource:
of "info":
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
if id != "":
return resError(Http404, "Info '$1' not found." % id)
else:
result.code = Http204
result.content = ""
of "dir":
result.code = Http204
result.content = ""
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
of "assets":
result.code = Http204
result.content = ""
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
of "tags":
result.code = Http204
result.content = ""
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
of "indexes":
result.code = Http204
result.content = ""
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
if id != "":
result.code = Http204
result.content = ""
if LS.readonly:
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
else:
result.headers["Allow"] = "GET, OPTIONS, PUT, DELETE"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS, PUT, DELETE"
else:
result.code = Http204
result.content = ""
if LS.readonly:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
of "docs":
var folder: string
if id.isFolder:
folder = id
if folder.len > 0:
result.code = Http204
result.content = ""
if LS.readonly:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS"
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS, POST, PUT"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, POST, PUT"
elif id != "":
result.code = Http204
result.content = ""
if LS.readonly:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS"
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS, PUT, PATCH, DELETE"
result.headers["Allow-Patch"] = "application/json-patch+json"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, PUT, PATCH, DELETE"
else:
result.code = Http204
result.content = ""
if LS.readonly:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS"
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "HEAD, GET, OPTIONS, POST"
result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, POST"
of "stores":
result.code = Http204
result.content = ""
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
if id != "":
result.code = Http204
result.content = ""
if LS.readonly:
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
else:
result.headers["Allow"] = "GET, OPTIONS, PUT, DELETE"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS, PUT, DELETE"
else:
result.code = Http204
result.content = ""
if LS.readonly:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
else:
result.headers = newHttpHeaders(TAB_HEADERS)
setOrigin(LS, req, result.headers)
result.headers["Allow"] = "GET, OPTIONS"
result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
else:
discard # never happens really.
proc head*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
var options = newQueryOptions()
options.select = @["documents.id AS id", "created", "modified"]
if id.isFolder:
options.folder = id
try:
parseQueryOptions(req.url.query, options);
if id != "" and options.folder == "":
result = LS.getRawDocument(id, options, req)
result.content = ""
else:
result = LS.getRawDocuments(options, req)
result.content = ""
except CatchableError:
return resError(Http400, "Bad request - $1" % getCurrentExceptionMsg())
proc get*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
case resource:
of "docs":
var options = newQueryOptions()
if id.isFolder:
options.folder = id
if req.url.query.contains("contents=false"):
options.select = @["documents.id AS id", "created", "modified"]
try:
parseQueryOptions(req.url.query, options);
if id != "" and options.folder == "":
if req.url.query.contains("raw=true") or req.headers.hasKey("Accept") and req.headers["Accept"] == "application/json":
return LS.getRawDocument(id, options, req)
else:
return LS.getDocument(id, options, req)
else:
return LS.getRawDocuments(options, req)
except CatchableError:
let e = getCurrentException()
let trace = e.getStackTrace()
echo trace
return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg())
of "assets":
var options = newQueryOptions()
if id.isFolder:
options.folder = id
try:
parseQueryOptions(req.url.query, options);
if id != "" and options.folder == "":
return LS.getDocument(id, options, req)
else:
options.folder = ""
result = LS.getDocument(id & "index.html", options, req)
if result.code == Http404:
result = LS.getDocument(id & "index.htm", options, req)
return result
except CatchableError:
let e = getCurrentException()
let trace = e.getStackTrace()
echo trace
return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg())
of "tags":
var options = newQueryOptions()
try:
parseQueryOptions(req.url.query, options);
if id != "":
return LS.getTag(id, options, req)
else:
return LS.getTags(options, req)
except CatchableError:
return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg())
of "indexes":
var options = newQueryOptions()
try:
parseQueryOptions(req.url.query, options);
if id != "":
return LS.getIndex(id, options, req)
else:
return LS.getIndexes(options, req)
except CatchableError:
return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg())
of "stores":
var options = newQueryOptions()
try:
parseQueryOptions(req.url.query, options);
if id != "":
return LS.getStore(id, options, req)
else:
return LS.getStores(options, req)
except CatchableError:
return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg())
of "info":
if id != "":
return resError(Http404, "Info '$1' not found." % id)
return LS.getInfo(req)
else:
discard # never happens really.
proc post*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
var ct = "text/plain"
if req.headers.hasKey("Content-Type"):
ct = req.headers["Content-Type"]
return LS.postDocument(req.body.strip, ct, id, req)
proc put*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
if id != "":
if resource == "indexes":
var field = ""
try:
field = parseJson(req.body.strip)["field"].getStr
except CatchableError:
return resError(Http400, "Bad Request - Invalid JSON body - $1" % getCurrentExceptionMsg())
return LS.putIndex(id, field, req)
elif resource == "stores":
var config = newJNull()
try:
config = parseJson(req.body)
except CatchableError:
return resError(Http400, "Bad Request - Invalid JSON body - $1" % getCurrentExceptionMsg())
return LS.putStore(id, config, req)
else: # Assume docs
var ct = "text/plain"
if req.headers.hasKey("Content-Type"):
ct = req.headers["Content-Type"]
return LS.putDocument(id, req.body.strip, ct, req)
else:
return resError(Http400, "Bad request: document ID must be specified in PUT requests.")
proc delete*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
if id != "":
if resource == "indexes":
return LS.deleteIndex(id, req)
elif resource == "stores":
return LS.deleteStore(id, req)
else: # Assume docs
return LS.deleteDocument(id, req)
else:
return resError(Http400, "Bad request: document ID must be specified in DELETE requests.")
proc patch*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse =
if id != "":
return LS.patchDocument(id, req.body, req)
else:
return resError(Http400, "Bad request: document ID must be specified in PATCH requests.")
proc serveFile*(req: LSRequest, LS: LiteStore, id: string): LSResponse =
let path = LS.directory / id
var reqMethod = $req.reqMethod
if req.headers.hasKey("X-HTTP-Method-Override"):
reqMethod = req.headers["X-HTTP-Method-Override"]
case reqMethod.toUpperAscii:
of "OPTIONS":
return validate(req, LS, "dir", id, options)
of "GET":
if path.fileExists:
try:
let contents = path.readFile
let parts = path.splitFile
if CONTENT_TYPES.hasKey(parts.ext):
result.headers = CONTENT_TYPES[parts.ext].ctHeader
else:
result.headers = ctHeader("text/plain")
setOrigin(LS, req, result.headers)
result.content = contents
result.code = Http200
except CatchableError:
return resError(Http500, "Unable to read file '$1'." % path)
else:
return resError(Http404, "File '$1' not found." % path)
else:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
proc route*(req: LSRequest, LS: LiteStore, resource = "docs", id = ""): LSResponse =
var reqMethod = $req.reqMethod
if req.headers.hasKey("X-HTTP-Method-Override"):
reqMethod = req.headers["X-HTTP-Method-Override"]
LOG.debug("ROUTE - resource: " & resource & " id: " & id)
case reqMethod.toUpperAscii:
of "POST":
if LS.readonly:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
return validate(req, LS, resource, id, post)
of "PUT":
if LS.readonly:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
return validate(req, LS, resource, id, put)
of "DELETE":
if LS.readonly:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
return validate(req, LS, resource, id, delete)
of "HEAD":
return validate(req, LS, resource, id, head)
of "OPTIONS":
return validate(req, LS, resource, id, options)
of "GET":
return validate(req, LS, resource, id, get)
of "PATCH":
if LS.readonly:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
return validate(req, LS, resource, id, patch)
else:
return resError(Http405, "Method not allowed: $1" % $req.reqMethod)
proc multiRoute(req: LSRequest, resource, id: string): LSResponse =
var matches = @["", "", ""]
if req.url.path.find(PEG_STORE_URL, matches) != -1:
let id = matches[0]
let path = "/v7/" & matches[1]
matches = @["", "", ""]
discard path.find(PEG_URL, matches)
return req.route(LSDICT[id], matches[1], matches[2])
return req.route(LS, resource, id)
proc newSimpleLSRequest(meth: HttpMethod, resource = "", id = "", body = "", params = "", headers = newHttpHeaders()): LSRequest =
result.reqMethod = meth
result.body = body
result.headers = headers
result.url = parseUri("$1://$2:$3/$4/$5?$6" % @["http", "localhost", "9500", resource, id, params])
proc get(resource, id: string, params = ""): LSResponse =
return newSimpleLSRequest(HttpGet, resource, id, "", params).multiRoute(resource, id)
proc post(resource, folder, body: string, ct = ""): LSResponse =
var headers = newHttpHeaders()
if ct != "":
headers["Content-Type"] = ct
return newSimpleLSRequest(HttpPost, resource, folder, body, "", headers).multiRoute(resource, folder & "/")
proc put(resource, id, body: string, ct = ""): LSResponse =
var headers = newHttpHeaders()
if ct != "":
headers["Content-Type"] = ct
return newSimpleLSRequest(HttpPut, resource, id, body, "", headers).multiRoute(resource, id)
proc patch(resource, id, body: string): LSResponse =
var headers = newHttpHeaders()
headers["Content-Type"] = "application/json"
return newSimpleLSRequest(HttpPatch, resource, id, body, "", headers).multiRoute(resource, id)
proc delete(resource, id: string): LSResponse =
return newSimpleLSRequest(HttpDelete, resource, id).multiRoute(resource, id)
proc head(resource, id: string): LSResponse =
return newSimpleLSRequest(HttpHead, resource, id).multiRoute(resource, id)
proc registerStoreApi(LS: LiteStore, ctx: DTContext, origResource, origId: string) =
var api_idx = ctx.duk_push_object()
# GET
var get: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let id = duk_get_string(ctx, 1)
let params = duk_get_string(ctx, 2)
let resp = get($resource, $id, $params)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, get, 3)
discard ctx.duk_put_prop_string(api_idx, "get")
# POST
var post: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let folder = duk_get_string(ctx, 1)
let body = duk_get_string(ctx, 2)
let ct = duk_get_string(ctx, 3)
let resp = post($resource, $folder, $body, $ct)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, post, 4)
discard ctx.duk_put_prop_string(api_idx, "post")
# PUT
var put: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let id = duk_get_string(ctx, 1)
let body = duk_get_string(ctx, 2)
let ct = duk_get_string(ctx, 3)
let resp = put($resource, $id, $body, $ct)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, put, 4)
discard ctx.duk_put_prop_string(api_idx, "put")
# PATCH
var patch: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let id = duk_get_string(ctx, 1)
let body = duk_get_string(ctx, 2)
let resp = patch($resource, $id, $body)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, patch, 3)
discard ctx.duk_put_prop_string(api_idx, "patch")
# DELETE
var delete: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let id = duk_get_string(ctx, 1)
let resp = delete($resource, $id)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, delete, 2)
discard ctx.duk_put_prop_string(api_idx, "delete")
# HEAD
var head: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} =
let resource = duk_get_string(ctx, 0)
let id = duk_get_string(ctx, 1)
let resp = head($resource, $id)
var res_idx = ctx.duk_push_object()
ctx.duk_push_int(cast[cint](resp.code))
discard ctx.duk_put_prop_string(res_idx, "code")
discard ctx.duk_push_string(resp.content.cstring)
discard ctx.duk_put_prop_string(res_idx, "content")
return 1
)
discard duk_push_c_function(ctx, head, 2)
discard ctx.duk_put_prop_string(api_idx, "head")
discard ctx.duk_put_global_string("$store")
proc jError(ctx: DTContext): LSResponse =
return resError(Http500, "Middleware Error: " & $ctx.duk_safe_to_string(-1))
proc getMiddleware*(LS: LiteStore, id: string): string =
if not LS.middleware.hasKey(id):
# Attempt to retrieve resource from system documents
let options = newQueryOptions(true)
let doc = LS.store.retrieveDocument("middleware/" & id & ".js", options)
result = doc.data
if result == "":
LOG.warn("Middleware '$1' not found" % id)
else:
result = LS.middleware[id]
proc getMiddlewareSeq(LS: LiteStore, resource, id, meth: string): seq[string] =
result = newSeq[string]()
if LS.config.kind != JObject or not LS.config.hasKey("resources"):
return
var reqUri = "/" & resource & "/" & id
if reqUri[^1] == '/':
reqUri.removeSuffix({'/'})
let parts = reqUri.split("/")
let ancestors = parts[1..parts.len-2]
var currentPath = ""
var currentPaths = ""
for p in ancestors:
currentPath &= "/" & p
currentPaths = currentPath & "/*"
if LS.config["resources"].hasKey(currentPaths) and LS.config["resources"][currentPaths].hasKey(meth) and LS.config["resources"][currentPaths][meth].hasKey("middleware"):
let mw = LS.config["resources"][currentPaths][meth]["middleware"]
if (mw.kind == JArray):
for m in mw:
result.add m.getStr
if LS.config["resources"].hasKey(reqUri) and LS.config["resources"][reqUri].hasKey(meth) and LS.config["resources"][reqUri][meth].hasKey("middleware"):
let mw = LS.config["resources"][reqUri][meth]["middleware"]
if (mw.kind == JArray):
for m in mw:
result.add m.getStr
proc execute*(req: var LSRequest, LS: LiteStore, resource, id: string): LSResponse =
let middleware = getMiddlewareSeq(LS, resource, id, $req.reqMethod)
if middleware.len > 0:
LOG.debug("Middleware: " & middleware.join(" -> "));
if middleware.len == 0:
return route(req, LS, resource, id)
var jReq = $(%* req)
LOG.debug("Request: " & jReq)
var jRes = """{
"code": 200,
"content": {},
"final": false,
"headers": {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Headers": "Authorization, Content-Type",
"Server": "$1",
"Content-Type": "application/json"
}
}""" % [LS.appname & "/" & LS.appversion]
var context = "{}"
# Create execution context
var ctx = duk_create_heap_default()
duk_console_init(ctx)
duk_print_alert_init(ctx)
LS.registerStoreApi(ctx, resource, id)
if ctx.duk_peval_string(cstring("($1)" % $jReq)) != 0:
return jError(ctx)
discard ctx.duk_put_global_string("$req")
if ctx.duk_peval_string(cstring("($1)" % $jRes)) != 0:
return jError(ctx)
discard ctx.duk_put_global_string("$res")
if ctx.duk_peval_string(cstring("($1)" % $context)) != 0:
return jError(ctx)
discard ctx.duk_put_global_string("$ctx")
# Middleware-specific functions
var i = 0
var abort = 0
while abort != 1 and i < middleware.len:
let code = LS.getMiddleware(middleware[i])
LOG.debug("Evaluating middleware '$1'" % middleware[i])
if ctx.duk_peval_string(code.cstring) != 0:
return jError(ctx)
abort = ctx.duk_get_boolean(-1)
i.inc
# Retrieve response, and request
if ctx.duk_peval_string("JSON.stringify($res);") != 0:
return jError(ctx)
let fRes = parseJson($(ctx.duk_get_string(-1))).newLSResponse
if ctx.duk_peval_string("JSON.stringify($req);") != 0:
return jError(ctx)
let fReq = parseJson($(ctx.duk_get_string(-1))).newLSRequest()
ctx.duk_destroy_heap();
LOG.debug("abort: $1", [$abort])
if abort == 1:
return fRes
return route(fReq, LS, resource, id)
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