mirror of
https://github.com/EtherDream/jsproxy
synced 2024-11-22 18:50:48 +00:00
28 lines
648 B
Lua
28 lines
648 B
Lua
-- ngx.arg[1] => chunk
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-- ngx.arg[2] => eof
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-- 大文件只返回首块 hash（用户从廉价带宽获取内容）
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if ngx.ctx._switched then
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local chunk = ngx.arg[1]
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ngx.arg[1] = #chunk .. ',' .. ngx.crc32_long(chunk)
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ngx.arg[2] = true
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return
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end
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-- 计算 HTTP 返回数据的 hash（用于统计）
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if ngx.ctx._sha256 == nil then
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local resty_sha256 = require 'resty.sha256'
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ngx.ctx._sha256 = resty_sha256:new()
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end
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if ngx.arg[2] then
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local digest = ngx.ctx._sha256:final()
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digest = digest:sub(1, 16)
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local str = require 'resty.string'
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ngx.var._bodyhash = str.to_hex(digest)
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else
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ngx.ctx._sha256:update(ngx.arg[1])
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end |