{"record":{"id":"ccb6fac321a399da","repo":"XIU2/CloudflareSpeedTest","slug":"err","errorCode":null,"errorMessage":"err","messagePattern":"err","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"task/ip.go","lineNumber":172,"sourceCode":"\t\tfor _, IP := range IPs {\n\t\t\tIP = strings.TrimSpace(IP) // 去除首尾的空白字符（空格、制表符、换行符等）\n\t\t\tif IP == \"\" {              // 跳过空的（即开头、结尾或连续多个 ,, 的情况）\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tranges.parseCIDR(IP) // 解析 IP 段，获得 IP、IP 范围、子网掩码\n\t\t\tif isIPv4(IP) {      // 生成要测速的所有 IPv4 / IPv6 地址（单个/随机/全部）\n\t\t\t\tranges.chooseIPv4()\n\t\t\t} else {\n\t\t\t\tranges.chooseIPv6()\n\t\t\t}\n\t\t}\n\t} else { // 从文件中获取 IP 段数据\n\t\tif IPFile == \"\" {\n\t\t\tIPFile = defaultInputFile\n\t\t}\n\t\tfile, err := os.Open(IPFile)\n\t\tif err != nil {\n\t\t\tlog.Fatal(err)\n\t\t}\n\t\tdefer file.Close()\n\t\tscanner := bufio.NewScanner(file)\n\t\tfor scanner.Scan() { // 循环遍历文件每一行\n\t\t\tline := strings.TrimSpace(scanner.Text()) // 去除首尾的空白字符（空格、制表符、换行符等）\n\t\t\tif line == \"\" {                           // 跳过空行\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tranges.parseCIDR(line) // 解析 IP 段，获得 IP、IP 范围、子网掩码\n\t\t\tif isIPv4(line) {      // 生成要测速的所有 IPv4 / IPv6 地址（单个/随机/全部）\n\t\t\t\tranges.chooseIPv4()\n\t\t\t} else {\n\t\t\t\tranges.chooseIPv6()\n\t\t\t}\n\t\t}\n\t}\n\treturn ranges.ips\n}","sourceCodeStart":154,"sourceCodeEnd":190,"githubUrl":"https://github.com/XIU2/CloudflareSpeedTest/blob/1da0c025d7b6f9bf0b2b0cf47a547f65430deab2/task/ip.go#L154-L190","documentation":"task/ip.go:170-173 calls os.Open(IPFile) and log.Fatal(err) on failure, terminating the program before any testing starts. IPFile defaults to ip.txt and is only bypassed when -ip is given (the IPText branch at ip.go:152). The raw *PathError is printed, so the message includes 'no such file or directory' or 'permission denied' plus the path.","triggerScenarios":"Running without -ip and without a readable ip.txt in the current working directory; -f pointing to a nonexistent or unreadable path; running the binary from a different directory than where the IP list lives; a BOM/CRLF-mangled filename is not the issue here but a directory without read permission is.","commonSituations":"Fresh clone/decompress where the user renamed or moved ip.txt; systemd/cron jobs whose WorkingDirectory is not where ip.txt sits; running as a user without read rights on the file; passing a quoted path with spaces incorrectly so the shell splits it.","solutions":["Confirm the file exists at the exact path passed via -f (or place ip.txt next to the binary) and re-run.","Pass an absolute path: ./cfst -f /etc/cfst/ip.txt, especially in scripts/services with a different cwd.","Or skip the file entirely by passing CIDRs inline: -ip 104.16.0.0/12,172.64.0.0/13.","Check permissions (ls -l) and read access if the error says permission denied."],"exampleFix":"# before\n./cfst -f ip.txt   # run from another directory -> log.Fatal\n# after\n./cfst -f \"$(dirname \"$0\")/ip.txt\"\n# or inline\n./cfst -ip 104.16.0.0/12,172.64.0.0/13","handlingStrategy":"validation","validationCode":"#!/usr/bin/env bash\nIP_FILE=\"${IP_FILE:-ip.txt}\"\n[[ -r \"${IP_FILE}\" ]] || { echo \"missing/unreadable: ${IP_FILE}\"; exit 1; }\n./cfst -f \"${IP_FILE}\"","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Prefer absolute -f paths in cron/systemd units.","Keep ip.txt beside the binary and run from its directory.","Use -ip inline CIDRs to remove the file dependency entirely."],"tags":["go","fatal","file-io","ip-input","cli"],"backgroundTag":null,"analyzedSha":"1da0c025d7b6f9bf0b2b0cf47a547f65430deab2","analyzedAt":"2026-08-15T22:22:10.737Z","schemaVersion":2},"datasetVersion":"2026-08-16T03:17:38.424Z"}