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annotate teal-src/prosody/util/jsonpointer.tl @ 13946:f5e8ab42c708

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mod_http_file_share: Check that files are still there with correct size Failed uploads can leave behind unused slots. Files shouldn't change size after they have been successfully uploaded, but might as well double check it.
author Kim Alvefur <zash@zash.se>
date Sat, 04 Dec 2021 18:56:51 +0100
parents 9364f0b5ecae
children
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b4c0efff8dd3 util.jsonpointer: Resolve JSON Pointers per RFC 6901
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1
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2 local enum ptr_error
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3 "invalid-table"
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4 "invalid-path"
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5 end
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6
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7 local function unescape_token(escaped_token : string) : string
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8 local unescaped = escaped_token:gsub("~1", "/"):gsub("~0", "~")
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9 return unescaped
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10 end
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12 local function resolve_json_pointer(ref : any, path : string) : any, ptr_error
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13 local ptr_len = #path+1
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14 for part, pos in path:gmatch("/([^/]*)()") do
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15 local token = unescape_token(part)
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16 if not ref is table then
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17 return nil
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18 end
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19 local idx = next(ref)
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20 local new_ref : any
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22 if idx is string then
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23 new_ref = ref[token]
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24 elseif idx is integer then
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25 local i = tonumber(token)
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e2c3582ab9fa util.jsonpointer: Silence Teal warning
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26 if token == "-" then i = #(ref as {any}) + 1 end
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27 new_ref = ref[i+1]
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28 else
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29 return nil, "invalid-table"
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30 end
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31
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32 if pos as integer == ptr_len then
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33 return new_ref
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34 elseif new_ref is table then
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35 ref = new_ref
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36 elseif not ref is table then
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37 return nil, "invalid-path"
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38 end
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40 end
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41 return ref
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42 end
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44 return {
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45 resolve = resolve_json_pointer,
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46 }