stephen schuresko
bd40b4f850
- Introduced a new Lua-based REST API for darktable, allowing external applications to interact with the darktable library. - Implemented core functionalities including image listing, retrieval, and preview serving. - Added support for OAuth 2.0 authentication with token generation. - Created a simple HTTP router to handle API requests. - Included JSON encoding/decoding utilities for API responses. - Developed a script to launch the API server alongside darktable, ensuring seamless integration. - Added necessary configuration and setup for the API server, including CORS support and error handling.
53 lines
1.8 KiB
Lua
53 lines
1.8 KiB
Lua
-- Base64 and Base64url encode/decode (pure Lua, no dependencies)
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local M = {}
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local CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
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local LOOKUP = {}
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for i = 1, #CHARS do LOOKUP[CHARS:sub(i,i)] = i - 1 end
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function M.encode(s)
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local out = {}
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for i = 1, #s, 3 do
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local a, b, c = s:byte(i, i + 2)
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b, c = b or 0, c or 0
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local n = a * 65536 + b * 256 + c
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out[#out+1] = CHARS:sub(math.floor(n / 262144) % 64 + 1, math.floor(n / 262144) % 64 + 1)
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out[#out+1] = CHARS:sub(math.floor(n / 4096) % 64 + 1, math.floor(n / 4096) % 64 + 1)
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out[#out+1] = CHARS:sub(math.floor(n / 64) % 64 + 1, math.floor(n / 64) % 64 + 1)
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out[#out+1] = CHARS:sub( n % 64 + 1, n % 64 + 1)
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end
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local rem = #s % 3
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if rem == 1 then out[#out-1], out[#out] = "=", "=" end
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if rem == 2 then out[#out] = "=" end
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return table.concat(out)
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end
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function M.decode(s)
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s = s:gsub("[^A-Za-z0-9+/=]", "")
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local out = {}
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for i = 1, #s, 4 do
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local a = LOOKUP[s:sub(i, i )] or 0
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local b = LOOKUP[s:sub(i+1, i+1)] or 0
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local c = LOOKUP[s:sub(i+2, i+2)] or 0
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local d = LOOKUP[s:sub(i+3, i+3)] or 0
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local n = a * 262144 + b * 4096 + c * 64 + d
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out[#out+1] = string.char(math.floor(n / 65536))
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if s:sub(i+2, i+2) ~= "=" then out[#out+1] = string.char(math.floor(n / 256) % 256) end
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if s:sub(i+3, i+3) ~= "=" then out[#out+1] = string.char(n % 256) end
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end
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return table.concat(out)
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end
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-- URL-safe Base64 (RFC 4648 §5): replace +/ with -_ and strip padding
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function M.urlencode(s)
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return M.encode(s):gsub("+", "-"):gsub("/", "_"):gsub("=", "")
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end
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function M.urldecode(s)
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s = s:gsub("-", "+"):gsub("_", "/")
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local pad = (4 - #s % 4) % 4
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return M.decode(s .. string.rep("=", pad))
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end
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return M
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