feat: display peer agent version in diagnostics #105
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Shows the AgentVersion from libp2p identify protocol below successful connections. The agent string is sanitized to ASCII-only and limited to 64 characters for clean terminal output. - sanitizes non-printable chars to underscore - relies on Go's json.Marshal for proper JSON escaping - displays agent version with green checkmark when available
daemon.go
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| // sanitizeAgentVersion removes non-printable characters and limits length. | ||
| // The Go json.Marshal will handle proper escaping of quotes, backslashes, etc. | ||
| func sanitizeAgentVersion(version string) string { |
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What are we protecting against here?
If it's JS injection, we can simplify with html escape (html.EscapeString)
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mostly easthetic reasons, avoid absurdly long strings, but also unicode that looks scary (ṳ̵̡̨̡͓͉̫̣͖̟͉̟̰̠̲̝̜͔̦͎̮͒͋̊͌̇͛̃̋̾̉̐͂́̈́̂̈́͋̑́̈́̌̎͆̃́̐͊͊̔̐͗́̔̈́͛͐̿̓͘͝͝͝n̵̡̨̢̡̡̡̨̧̡̢̨̧̡̨̨̢̡̡̛̛̛̖͇̗͇̱̣̙̖̤͎͚̹̱̳͍͙̩͇̣̱͕͔̮̱͇̱̻̫̮͚̻̳̹̬̖̞͖̯̮̰͎̖̠̳̯͙̙̺͎̝͔̞͓̩̫̣͚̻̺̲͙̞̭̱̭̯̻͓͚̬̣̟͓̪̲̙̦͕̹̻̺̝͕̙͓̖̟̙̗̰̟̼̮̳̳̞̳̬̦̙̬̫̱͇͉̹͉͖̺̟̳̥͕̘̮̠̙̪̗̠̮̹̥̫̜̱̞̉̾̋͐͑͗̍͂̃̓̓͌̈́̋̃́̈́͂̌͋̇͌̏͛͑͌̈́̋̑̈͌͒̽̈̾͗͂̌̊̓̀̓͑͊̇̌͋̑͗͋̆̿̋̓͐̀̀̿̌̄̓̎̾̔͊͗̾̿̍͋̏̓̆̎́͑̆̍̿̏̇̔̈́͒̊͒̈́̃̇̈́͛̔͋̀͑̋͛́̆̐͋̄͆͑̈́̀̀͗̌͐̂̂̐̃͗̔͑͗̿̃̽̔̓̎̇̓̀̽̈́͂̋̿͐̿̂͒̍̒͒͛͌̾̄̐̏̿͘͘͘̚̕̚̚͘͘̕͘̕̕͘͘̕̕͜͜͜͜͜͝͠͝͝͠͝ͅͅͅͅͅį̶̡̢̨̡̡̢̨̧̨̢̧̢̛̛̛̛̛̛̱̣̘͈̬͙̤̬̙̪̪͉̜͎͙̲̰̰̹̙̩̗̼̯̺̟̫͖͎̞̪̳̜̯̜̮͉̗̭͉͎͙̯͔͇̻̳͚͓̬͙̟̱̜̺̻̳̮̤̳̝̳̞̹̳̤̟͎̪̱̤̗̫̹̩̣͕̪̩̣̩̫̲͕͈̩͖̭̹͎̲͈̞͚̝̐̀͐́̈͆̇̔̑̊̀͗̀̉͒͗̃̏̏́̅̾̏̋̃̃́̉̈͐̅̀͌̓̒̾͋̍͐̇͋̂̽̓͗̋̈̓͂͑̉͌̋̒́̋̍̾̐̎͂̀̏͆̋̂̽͂͐̒̍̊̑̍̐͗̔̄̓͐̈́̽̔͂̍͑̌̽̌̒̽̽̈̃̋̾͗̏̓͌̒̌̇̓͋̾̾͛̔̔̇̓̈́̄͒̇̈͒̃̽͌̃̌͒̓͐̀̈́͌̀͗̌͆͋̎̇͋͆́̏̔̉̿̈́̃̈́̿͗́̓́̉͋̅͑̄̒́͗͊͗͐̔̇̊̇̓̅͂̂͒̾͋́͋͑͊̅̉̆͋̊̅̒̇̇̾̈̇̇̾͛̀͒̏̔̍͐͊̍̂͋̈́̊̋̃̑͘̚͘̚͘̚̕̚̚͘̕͘̕͘̕̚̚̚̕̚̕̚͘͘̚͘̕̕͜͜͝͠͝͝͝͠͠͝͝͝͠͝͝͠͠͝͝͝͠͠͝͝ͅͅͅͅc̷̢̢̧̧͖̪͙̟͚̺̞͈̰̼͓̟̯̼̑̾̑͑́̓̽͗̓̋͑̉̋͜͠͝ơ̴̡̡̨̨̧̧̧̢̡̧̨̡̢̡̡̡̡̧̧̢̢̡̧̧̧̢̛̛̛̹̪̩̲̙͖͙̺̝̱̻̝̗̼̻̫̹͎̙͚̭͙̲͎͕̟̰̬̥̭̯̜͙̹̫͉̗͖̣̣͉̝̺͕̭̟͇̹̭̻̞͇͙̲͓̭̤̟͓̳̻͉͚͚̱̖̗̠̳̦͚͇͍̭̠̫͉̲͕̦̙̪̺̫̙̩͉̯̥̠̜̣͔͔͚͉̹͚̥̰̳͓͚̜͖̖̗͇̹͔̫͖̩̹̰̰̭̫͉͓̮͔̞̰̭͈̜̞̼̫̼̖̭͕̹̯̲̞͍̫̩͍̠̳̜͕̮͇͈͎̞̫͍̙̻̙͇͈̺͇̣̼̗̰̥̝͉͉͕̦̙̘̱̞̼͉͇̥̗͖̫̮̘͈̼̠̻̜̖̝̜͈̦̮̥͉̩͇̰͎̤̰̟̩̰̻̮̜̖̭̹͎̠͇̮̹̟͕̺̯͍̦̝̲̗̭̖̤̮̭͍̝̳͍̞̱͚̮͕̖̅̽͐̈͆͒̿̇̎̽͆̑͗͊̃̊̈́̆͌̑͆̓̌̌͐̂̄͆̅́́̂̓̒̈́͆͒͌̓͂̈́͒̏̂̈̀́͆̐̄̐̈́̊̑͌̽̌̄̋͐́̊̽̀̽͛̅͛̀̾͒͒̅͐͋̑́͂͋̀̀̒̌̿̅͗͂̅̋̀̔̾̋̀́̌͛̇̾͋͊͑̑̄͋͊̔̃̋̒̓́̊̿̎͌͗̓̌̊͛̐͌̓͛́͌̉͌̉̍̉̅͒́́̇̓̓̊̉͑̍͊̂͛̇͊̃̉̒̉̏̏͛̃̎̐̿̓̌͐͂̇̇͂͌̓́́̓́͒̊̉̍̿̀̎́̂͂̀͗͑͒̾̽̓̽̐͐͑̽͋̃͒̈́͑̄̆͆̈́́̈́͑͛̉͌̅̃̋̔̾̈́͆̆̂̃̔̿̋͐̽̀̌͗̈́̌͗̏̄͗̐̚̚͘̚̕̕̚̕̚͘͘̚̚͘͘̕͘̕͜͜͜͝͝͝͝͝͝͝͝͝͝͠͝͝͝͠͝ͅͅͅͅͅḑ̵̧̡̨̨̨̧̛̛̛̛̛̛̼̺̣̣̭̟̜̣̦̣̥͖̰̻̱̩͖̪͙̠̣̖̜̜̝̙̥͈̥̣͚͈̣͉͙̩̦̗̩̠̝̤̱͍̹̣̟̙̪͕̙̰̟̣̩̦̣͙̦̦̥͖̟͈̩̙͔̠͈̹̬̥̯̼̺͚̥̮̦̩̦̜̳̟͎͉̱̼̝̣̘̮̙̗͙̼̳̻͒͛̉͂̈̽̆̃̇̾̽̈̋͂̽̾̀̾̌͋͐̑́̆͌̋̈́̽̆͒̔̃͊͋̌̒̏͆̂̆̔̈́͛̍́̍̋̓̒͌̆͗̑̔̆̀̈́̈́͛͑̐̀͋͊͌̿̋͂͐̃̀͊̉̀̈́̎͊̃̒́͒͌͌̈́̈͂̽̑͊̽̋͑́͋͊̇̂̃͌͗͊͋̾͂͋̆̎̄̅̑̎̆͆͑͑̇̋͂̾̀͋͌̄́̎̿͊̀͒̓͊͋̋͊̽͛̊̀̏̎͊̎̎͗̉͗͆̒̒̌̆̏̍͑̂͑̂̒̍̐̃͑̈́͐̉̃͗̊̍̊͂̀̌̈̏͛̍̇̉̀̈͑̀̊́̂̕͘̕̚̚̚͘̚͘̚͜͜͜͜͝͝͝͝͝͠͠͠͠͝͝͠͠͠͝͝ͅͅͅe̷̡̧̧̨̛̛̛̛͔̘̗̠̹̟͙̥̦͔͖͈͉̩̪̜͈̣͚̙̟̬̻͈̰̠̼̭͕̫̱͈̹̩̫̫̙͙̭̼͖͕̥̭̙̠͇̯̯̜̗͚̼͔̤̟̤͓̯̹̅̐̄̈́͗͑́̍́̉͊̀̂͊̈́̑̍̈́̐͒͐̃̈́͂̄̈́͋̍̍̔̅͋͛̅̾͂͗͆̈́̿̓͆̓̓͑͑̉̈̏̀͛̓̽͊͆̈́̈́́̆̒͂̓̋̓̊̀̎̈̔̏̅͌̀͌̿̾̄̽̌́̓̌̓̿̀̀͂͌̌͒̈́́́̈́͛̈́̄̆́̒́̊̇̊̀̈́͗͐͌̉̇́̊̔̓̈́̽̉͑̈̓́̔̓̂̓̌͑͂̐͂̈́́̓̆̒̓̋̐̄͑̓̃́̾̌̇̓̆́̀̒̏͒̿̆͊̎́͌̇̌̌͌͋̓̿́̐̋͊̆̚̕̕͘̕̕̚͘̚͘̚͜͜͝͝͝͝͠͝ͅͅ ̵̡̡̧̢̢̨̨̧̢̗̖̹̻̞͉̺̤͕͇͖͖̜̝̘͚̠̺͙̥̟̺̳̩͍̭͙̯̙̭̠̱̞̳̤̺̺̦͎̠͇̟͕̹̙̬̬̣͔͈̞̫͇͕̘̻̞̰̮͉̗̩͎̗̜̖͓̳͍͕̻̭̝̣͔͚̺̩̣̘̤̬̜̖̞̙̼̹̝́̌́̏̍̕͜͜͜͜ͅͅc̵̡̛̟̩̫̓͐̈́͗̾͆͛̿̆̄̓͝͝à̸̡̧̢̮̩̲͔͎̲̯̦̟͖̱̩̠͕͚̙̗̟̙̱̥̮̙͇͍̦̜̭̬̤̮͍̫͕̹͖̦̗̖͙͎̳̭̰̳͓͙̳̙̣͇̻̙̻͔̖̻͕͚̮̗̤̻̥̫̱̼̤̻͓̦̩͈̤̥̎̎̐́̃̃́̀̌͗̋̀̾͋̂̓͆̈́̅̏̅̍͊̄̇̎̊̓̕͘̚͜͜͠͝ͅͅͅṉ̵̨̢̨̨̡̢̢̛̛̛̛̛̗͈̠͈̻̩͚̘͔̣̺̜̜̠̹̠̺̫̻͓̤̲̞͇̳̝̹͔̲̤̬͔͇͙̜̼̮̹͇̥͎̩̘͍̗͕͇̩͇̦͎͎̞̣͉̣̳̲̣̼̩͍̟̗͓̺͈͔͇̦̭̗̤̅̆͌͆́̃̐̋̎̏̀͒̋̿͂̄̃̉̑̓̏̀̂̾̅̿̉̿̈͋͆̐̑̍͒̉̐͐̈͋̊̉̋̔̐̋̑̐̆͒̂͒͑̇̈́͛̏͂͋̒͊̍̔̄̊̇̎̔̈́͐̄̌͋̑̐́̂̔̾̊̏̿͐͋̃̑͋̄̈́̓̌̉͊̑̊̏̌̈̀̂̏͗̏̋̒̂̌̉̄̈́̑̾̐̂̈́͗̑̔̃͛̓̂̾̅̂̅̍̏̈́̀̄̾̓͌̐̍͊̏̇̎̀͒̂̉̊̂̍̎͐̈̋̐̍̒͌͂̊̐́͆̇̿͗̋̿̓̽̀̊̽͛͗̈́̓̊̍̆͛̉́͛̐͋̚̚̕͘͘̚͘̕͘̕̚͘͜͠͝͝͠͝͝͝͝͝͠ͅͅ ̴̨̨̢̡̡̡̧̡̢̡̢̛̛̛̛̛̙͎͉̝̤̬̣̟̪̞̹͍͕̭͉͈̺̺͓̻̺͔̙̙̱̰̖̟̩͖͙͙̜̞̙̤̣̩̮̲̲̮̱̮͍̬͕͈̰̳̹̰͕̝͈̩̰̮͖̪̼̮̞͚̻̥͓͖̮̮̱̪̲̬̞̺̜͎̦͙͓͓̮͈̰̻̩̜̥͍͈͔̣̺̬͈̺̣̦̥̦̤͚̻̹̍̽̏̑̊͑̾̂́́̽̈́͊͗̔́̑͋̓͆̀̏̔̓̈́͆̒̏̊̽̿̔̀̂͑̔͒̀̑̊̇̍͋̂͊̊̾̒̅͋̈́͆̈͂̓̂͐̋̇͋̓̽͆̈͆̂̋͒̐̇͒̽̒̈́̑͑̈́͂͌̀̇̏̎͑͗͂͒̈́̅͌͆́̄̋̌̅̾̾̍̄̍̽̔̌̎̓̎̀̾̾̈͗̋̐̄̀̋́̿̾̉͆͛̈́͑̆͑̇́͐̄̇̈́̄̎͗͐̔̓̆̇͘͘͘͘̕̕̚͘̚̕͘̚͜͜͜͜͜͠͝͝͝͝͠͠͠͝͝͠͠ͅǎ̷̢̢̡̡̨̬̠͍̹͖̰͙̝̪̭̲̘̘̟̟̹̙̼͔͈͕̳̩̱̙̥͎̙̱͖̙̬̳̝̠̺̣̯̝̥̲̳͍̱̠̮͎̰̗̪̖̜̬̺̰͖̥̗̞̝̝͖̥̭̼͔̯̤̦̙̟̜̺̤͙̗̝̜̥͎̳̮̲̥͔̘̞̟͕̱͈͖̺̠̓̋͗̒͛̈̇̏̉̓̈́̔͂̽̉͒̒͌͊̉́͐̉̅̐͗͛̿̾̽͊̅̒͛̔̓̓̅̂̐̆̌̌̇͆̾̉̓͌̓͋̿̔͌̒̂̅̍̄͌̏̏̒͂͐́́͛̌͒̒̃̊͐̓̐̆͘̚̕̚̕͘̚͜͜͝͝͝͝͝͠͝͝͝͝l̵̢̧̨̡̧̡̧̧̧̨̡̨̡̨̡̨̡̡̧̨̛̛͎̯͍͍̥͔̱̘̭̯̗͙̬̳̮̖̯͎̜̻͕̳͎̣̻͓̟͖̘͓͎̱̩̦͇͎̺͇̗̬̻̝̲̘̳̩̭͈̪̗̳̜̹̯̬̺̫͖̟͈̤͔̙̖͍͙̹̰͖͙̞͉̳̺͇͖͇͕̦̞͍͖̜̼̤͙̱̩̠͕̳̥͈̫̪̬͈͎̜̭̦͉͖̺̝̝̻̮̪͈̰̮̻͕͕̩̠̟̖̱̜̜̱͎̺̤̣̤̦̹̜̩̮̙̱̰̫̭͈̯̬̱͇̰̰̤͉̟̥͔͚̝̞̦̽̅͒̈̒̈́̉̅̿̏̿̋̽͌̈́̽̒̂͆̽̏̄̀̍́͐̅͛̐̀͗͌̒̋͒̌̀͛̀̉̽̀͑͂̀̈́͌̃̈̀̊̎͘̕̚͘͘̕͜͜͠͝͝͠͝͝͝͝͝ͅͅͅͅş̸̡̢̧̨̨̧̨̧̡̨̡̨̨̧̧̢̧̧̡̧̡̡̛̛̛̛̬̝͎̺̫̩͕̰̘̝̻̜̥̝̘̖͕͙͙̟̗̗̫̝̺̬̙̤͙͍̣͔̠͖̩͈͖͎̺̪̜̺̺͉͙̜͇͔͙̮̣̩̩̮̗̥͉̠̳̹̪̟͇͖͙͕̝̘̯͔̩͙̦̰͖̞͉͍̺͚̥͍̖̼͈͔̞͉͚͖̰̪̳̣̼͙̳̫̪̪̲̠̜̹̟̺̥̞̳̟͔̻̠̜̥̙̭̩̻͎̘͉̬̲̺͔̱̲̣̮͙͎͎̞̗̙͙̪̮̋̏̔̓͐̾̐͑̀͑̈́̊͌̀̑̿̏͌͛́̊̔͗̔̌̐́͑͛̊̎̀̐̐̾̈́̐͌̋́̈̂̂͌̂̈̉͗͗̈́͐͛̑̅̔̄̄̐̒͂̃͐̇̒̌͂̏̊̏̊̏͊̈́̾͑͊̋́̓͂͛̅̿̔̆̀̃̾͂̾̾̈͂̃̽͋̈́̌̽͋́̅͊̽̎̽̏̓̄͌̃͊͊̋̇̌̓̈́́̊͛͋̉̍͒͊̾̈́̂̇͊͐͂̃́̌͌̔͌̑̑̃͆̊͒̈́̋̌̂̇̀̂̀̔̽̾͛̉͊̆̿́͂̋̊̾̾͊̅̂̉͗̕͘͘̕̕̕̚̕̚̕̚̕͘̕̕̕̚͜͜͜͜͜͜͝͝͝͝͝͝͝͠͝͠͝͝͝͠͝͝͠͝ͅͅͅͅo̷̡̨̢̡̧̧̨̨̧̨̨̡̧̨̧̨̧̧̢̢̨̨̨̢̢̡̧̧̧̧̩̫̜̰̞̠̫̪̦͔͉̭̖͈̺̥̖̪̫͎̰͓͉̥̻̫̮̥̫̰͚̞̠̬̟̟̩̯̲̲͔̜̬͈͇̩̟̣͔̺͎̜̻͚̰̟͉̪̯͍̱̩̻͍̙̙̬͙͍̘̖̳̻̺͍͓͙̺͎͖̠͎̭͕̬̠̯͇̗̫̱̱̺͕̖̝͖̮̟̮̻̠͖̠͍̳̮̠̗̮̝̫̥̦͙̯͚̣̞̩̬͓̻̬͈͔͎͈͉̠̜̞̬̫̘͕͍͕̳̙̙̰̠͚̥̟̟̹̤̝͙͕̫̦̪̘̠̜̣̝̯̘̝̘̫͇̮̺͕͎̟͖͍͎̩̠͉̞̱͙̥͈͎̻͕͎̳̠̭̖͍͇̜̳̮͈̥͓͚͍̙̭̜͚̪͈̦̟̼̮̭̖̫̩̱̭̞̙̻̻̦̘̱̬̬̤͔̬̱̜̜̹̖͙̼͚͇̹̰̻͕̖̹̤͖͉̘̰̬̞͇̽̐̃͂͆̄́̉̌͊́̊͆́̽̓̊̆́̑̉͆̌́̾̆̀́̐͋̒͗̋͘̚͘͜͜͜͜͜͜͝͝͝ͅͅͅͅͅͅͅͅ ̶̨̧̢̡̡̨̡̢̢̧̢̡̧̢̢̢̧̧̢̢̡̨̧̢̨̨̧̧̨̛̛̛̛̛͔̥̰̟̩̯̺̯͔̹͍̜̖̗̘͖̬͉̩͔̟͔͇̟̱͚͔̗̹̻͍͉͚͔̫̲̱̜̹̯̭̳͍̮͕̼̥̤̘̞̯̲̺̖̬̖͇͚̻̣͙͓͙̣̩̠̹̫̱͇̬͍̘͓̱͇̖̲̞̦͈͎̯̞̠̹̮̰̺̻̝̞̩̩̱̱̺̞͎̹̠͈̠͙͇̘̺̬̤͎̜͚̱̤͚͔͈̜̜̭͚͖͓̜͇͕͕̬̣̭͇̝̹͚͙̜͔͉͇̞̝̮̲̝̠̥̖͇̠͓̫̥̟̳̤͚͎̣͇͖̯̱̠̗̖̤̣͇̥̳̬̜̟͓̰͇̣̤̯̖̘̼̹̱̗̻̼̫̖͇̬̳̥̗͓̻̝̯̺̺̪̫͎͖̲͇͕̬̯͎̟͕̜̖̣͓̞̬͙̫͓̙͚̠̖͇̹̜͓͖̦̬̥̖͚͉̱͕̜̙͚̬͗́̆͂̄̽̈́͌́͗͐͐͋̔̋̈̓̉̆̽͛͐̉͂̽͒̏̐͋̓̽͑̀͗̄̎̔̀̑̏̌́͊̈́͐́̽̾̿͂̊̃̑̔̃̈́͐̍̌͋͊́̓̅̓̈́̎͋͛͌̀͐̌̍́́͘̕͘̕̕͜͜͜͜͜͜͜͜͜͜͜͜͜͝͝͝͝͠ͅͅͅͅͅͅb̸̢̨̢̨̢̧̡̡̨̨̛̛̛̛̛̛̛̛̛̦̯̱̲͚̫̭̦͉̖͖̗̫͎͔̙̺̟̼͙͉̟͇̞̭̤̝̯̳̭̘̺̲͕̭̥͇̮̠̪̮̯̞̲̫̲̖̬̥̳̥͚͇̳̞̪͇̹̱̻͈̼͔̮̞͇̣͖̗͙̼̗̱͕͎̜̘̫͇̭̜̣͉͚̥͓̮̘̻͓̻̜̪̟̪͍̞̱̣̦̝͉̼̼͓͕̙͈̯̲̩̼̙̒͌̀̓̏̾͐͂̋̉͋͌͊̓̂̿̀͌́̃̇̈́̇̀̿̇̈̾̄̄̀̆̌̐̋̾̓̂̀͂͌̈̿̅̊̏͊͒̑̊̇͌̇̇͆̅̆̇̑͛̐̈́̇̍̂̒̇͊͒̀̊̏̆̊͑̈́̄͐̐͒͊͆̽̎̈́̂̏̾͛͌͆͂̎̂̎́͋̂͑̓͒̎̿̌̓̓̉͆̆͒̇̒̔̍͗̐͛͗̂̓̀͑̊̊̀̋̌͒͂͛͌͂̎̋̅͋̇̋̈̂͗̉̈́͊̓̃̇̆̔̃̈́͛͒̊́̀̏͗̉̃̎̀̂͑͐̃̑́͐̋̑̎̀̊͒͒̓̄̈́͆͆̔̓̋̓̋̒͛̾̆̆̀̑͌̉̓̔́̌̈́̓͊̔̈́̋̿̆̂̏͑͒͑̈́̈́̚͘̕̕̚̚͘̕̚̚̕͘̚͘͘̚͘͜͜͝͝͝͝͠͝͝͝͝͝͝͝͝͝͝͝͠͝ͅͅͅṛ̴̢̡̡̡̡̧̧̨̧̨̡̡̨̢̡̡̨̛̛̛̛̛̛̛͚͔͙͓͓̙̭̥̣̟͍̘͉̭̜͖̝̣͔̲̦̺͉̖̱̟̗̼̬̝͕͔͉͇̫̟̲͖̝̣̰̦͖͕̺̹͇͚̬̰͓̮͖͇̯̣̞̥̗̜̭͔̙͉̝̬̹͇̝͎̱͇̻̺̝͙̤̬͎̤̩͙̬̦̦̤͖̞͕̼͍̼̞̹͉̮̱̹̗̬̗͕̣̰̳̩͕͓͔͇̫̦͕̼͍̙͕̙̭̞̘̲͙̰̩͉͚̝͊́̎̏͆̓̉͒͂̅̅̒̉̍̑͆̆͗̍̈̎̈͐͒̓͑̔̀͊͑̽̈̀̾̌̇̃̉̑͌̊͋̄͛͌͆́̄̒̍̉̋͆̈̀̉̊̋͆͂͂̎̃͐̓̌̋̊̉̉̀̇̓́͒̈́̆͂̾͑̔̑̀̄́̒͆̄̃̔͑̔̽͆̌̏̾̃̈́͊̽̒̈́͑̍̈̂́͆̈́̏͛͒́̊͋̈͋̄͊͂̋͊̽̅̏̂̓̐̿͊̽̀̃͋̈̐̄̓̀͑̂̇͋̊̾̑̈́̐̽̎̀̑̆͋̈́̒̆̓̃̉̓̉̈́̾̈́͗͊͛̉͊͗̒̾̈́̀͗̽͒̀́̍͒̍̈́̈́͛͛̌̊͊͗̒̆̄̓̽̀̀͑͒͋̓́͂͗̎̄̓̽͂̎̊̈́͘͘̕̕̕̕͘̕̚͘͘͜͜͜͜͜͝͝͠͝͝͠͠͝͝͝͝͝͠͝͠͝͝͝ͅi̸̡̨̢̨̢̛̛̛̛̛̠̗͍̜̜̪̯̣̫̦̞͇̙͔̤̱͍̝͖̭̰̤̰̳̻͇͎̠̱͕͖̞̰̩̼͔̞̺̼̻͇̩͓͕̱̭͎͙͒͂̈́̓̏̋̌͊̈́̍̌̈́̈́̋̀͒̓͋̆͐̊͗͒̎̇̆͒͗͌̀̿̓̅̑̔́͂̏̍̿̄̎̎͒̈́̔͛̉͗̑̋̓́͂͌͋͊͗̂́̾̾̍̏̌̋̇̿̈́͗̈́̓̈́̆̓̈́̄̌̑̐͂͐̒̔͑̈́̍̿̈́͌̔̈́̂̉̆̀͊͊̄̾̃̈̍̈͋̋̌̅͑̉͗̓̒̐́̉́̅̐͌͋̽̉̈́́͒͌̋̈́̓͂̀̆̋͗́̂͗̀̇͂̐͆́̐̎̾̒̋͐͆̅̔͛̈́͐̐͊́̌͗̿͌̑̾̓͒̒̌̏̇̀̒̈́̐̊̉̏̋̾̅̈́̂̕͘̚͘̚̚͘̕̚̕͘͜͠͝͝͝͝͝͠͝͠͝͝͝͝͠͝ͅͅņ̵̛̱̪̙̺̻͚͎͚̤͙̠̹̜́͆̊̽̈́̋̾͑͊́͐̂̿͑̀̍̾̋͌̔̀͛̂̌́͌͐͑̓͂͑̃̂̋̋̉̽̏̊͛̈͐̓͑͒̚̚̕͜͜͝͝͝͝ͅġ̶̨̨̢̨̧̡̛̛̛͕̟͔͉͖̤͔̯̖̺̰̖̭͇̦͇̬̲͖̪̻̗̟̥̺̼̬̲̾̌͊̽̌́̒̈́̋̿̈́̆̍̃̓͐̄̑̂̆͌̂̑̐͆͐̍̈́́̇͊͗͊̋͑̐̊̔̾͂̃̌̓̆̊͌̏̋̒̈́̾̐͛͌̓́͋̔̾̽̍͑̐̑̒̌͛͊̾͂͐͑͊̅̀͊̀̀͑̊̇̿̌͆̾͋͐̄͒͊̏̉͗͋̿̏̃̂̓́́̅̌̄̇̀̈́̄́̌̀͋̓̉̓́̏͊̄͑͂̃̔̈́̃̋̉̏̐̃́͋͐̂͛̀̀̂̉́͊̆͂̄̏̽̐̒̐̉̏͛͛̇͒͋̊̀̃̆́̽̊̈́̂̊͛̇͗̈́͂̐͐̂͐̅̑͂́̋͂̃͒̑̂͊̋̀͒̿̒̈́́́͑̏̄̌̚̚̚͘̚̕̕̕̚̚̕͘͘̕̚̕̚̕͘͘͜͠͝͠͝͠͝͠͝͠͠͠͝͝͠ͅ 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̷̧̧̧̢̧̡̡̨̡̧̨̨̧̨̨̧̛̛̝̱͓̪̥̱̯͕̩̘̘̻͉̘̗͎͉̟̫̞͓̬͉͚̼̟̰̖̪̜̞̹̣̫͍̻̼̭̬̣̦͉͚̤̱̯̤̯͎̖͕̱͔͓̻̞͕̭̖̻̫̮̮̼̪̗̘̲͉̰̞̲̣̣̘̗̻̰̯̫̘͙̫͓̰̬̺͚̻̳̫̦͙̤̩̳̩̟̬̞͖̥͙̱̦̖͚̬̙̘̞͖̙̫̪̻̪̭͖̰̝̰̲͉̰̱̝͚̟̺̭̻̣̲̖̥̣̯̻̗̱͉̥̙̦̥̺̘̠̹̖̘̟͔̰̘̮̥̱͇͚͓͔̤̫̫̞̖̺̩̏͋́̓́̈́̈̈́̅̌̀̏̉̑͂̓͌̉̃̊̂̂̑̉́̇́̒̒̓̔̑̎̔̄̃̏̈́̈̈́͊̌͂̂́͑̇̿́͑̎̐̋͊͐̍̊̋̃͐͑͌́̊̒͆͑̓̏̆͆̐̈́̑͐̃̔̅́̑̃̆̎̓̽̎̄͑͒̌́͋͒̎̃͊̄́͑̑̀̓̓͗̄̓̓͗̐͌̑͒̇́̓͑̈́̀͌̓̑̈́̀́̄̎̈́͒̌͒̅̇̐̃̋̔̑͒̾̄̈́̈́̄̾̆̃́̈́̑̋̈͂̓̊͒̏͛̌̎̽̈́̏͋̎̑̐̉̎͛̎͛̎́̌̓̑̓̈́̇̓̈̉̿̀͐͒͑̌̐̑͂̃̉̅̀̓́̈́͒̾̀̃̀̇̒͗͗̈̉͑̏̈́͛͆̅̾̒̇̀̐̓͊̀̌̉̓͒͒̿͑̊͆̃̊̎́̎̈̽̊̿́͐͒͒̍̕̕͘̚͘͘̕̕̚͘̚͘͘͘͘̚͘̕͜͜͠͝͝͝͝͝͝͝͠͝͝͠͝͠͠͝͝͝ͅͅͅͅń̵̨̨̨̧̡̨̡̧̧̧̢̧̢̛̛̛̛̛͉̥͎̱͍̞͖͓͖̞̞̥̞͇͕͔̜̟̜̪̩͈͕̼̩͈̤̤͕̥͇̮̜̺͍̺̤̞̝͎̬͕͚̲̠͎̤̺̯͙̰̯̞͎̙̦̲͍͚̠̥͉̫͓̟̝̥̣̦̱͈͚̭̻̜̮͍̜͈͈͖̙̣͍̪̠͔̗̥͙͕͕̝̤͈̟͔͔͔͚̩̭̙͇̼̤̮͈̯̗͙̟̤̩̩͇̗̪̠̤̥̜̥̜͎͖̳̼̜̹̘̝̰̗͚͍̙͈̪̤̲̞̮͕͚̲̗̬̰̗͔̟͈̝̟̗͓̙̙͇̘̘̩̗͚̰̦͖͈̘̙̬͓̮͖̳̤̪͓͔̻̳̘͎͈̭̣̫̙̙̙̫̫͙̗͉̒̆̎̍̓͋̀̃̽̐̒̍̋̾̽̎̎͑̐̾́̾̃̌̌̇̔́̈́̾̄̈̏͗͐̈́͐́̑̀̓̀́̇͂̈́̀̇̉̈́͂̍̈́̌͑̽̓͑̽͂̍̄̀̑͛̃́̊̍́̓́́̈́͗͐͐̀̈́̄̎͑̊̀̃́̑͌̀͑̃̎̅̂͐͛̎̃̅͗̌̆̑͋̍̓̌̆̍̓̓̔͂͂̒̅͊͆̆̀̅̃̆̃̋̆͆̋̀͑͊͌̅̈́̅̆̿͂̐͊̐̈́̊̅̈́̿̀͌̏̂͛̊̔̓̌͒̐̈́͑̇̍͂̌̌͑̆̓͊͗͒͒̂̄̽̐̐̋̓͐̑̚̕̚̚̕̚̚̕͘̚̕̕͘̚͜͜͜͜͜͜͝͝͠͠͝͝͝͝͠ͅͅͅͅơ̸̡̢̧̛̛̛̛̜̱̼̟͚͉̣̩͈͚̪̺̲̖̤̜̞̺̺͙͓̮̙̰͍̹͖͔̐̊̿͑̈́̃͌̑͐̾̉̓̒̅͊͒͌͆̍̈́̆̾̔̇̓̒͒̄̎͂̀̈́͑̌̆̊̿̄̋̌͊̾̂̀̔̈́͋̈́̎̌̃̀̈́̑́̾̓̃͊̈̎́̈́̽́̀̿̈́̏̈́̈́̉́̒̆̄̒̾̽̊͂̓̀̀̀͑͑̌̅͂͗̾̽̓̊̾͑̿͌̇̅͒̉͑̓̂̍̐̽̃̂̏̆̾́̊̄̇̃̈́̒̋͆͗͆̾͊͒̿̂͘̚̚̚̕̕̕͜͜͝͝͝͝͠͠͝͝͝͝s̸̨̢̨̢̛̛̛̺̰̹͉̜̝̗̱̹̰̤̼̝̜̺̤̘̱̻̪̠̩̙̮͔̻̰̞͖̩̦̟̹̪̪͎̮̻̬̫͔̙̩͕̮̜͖͗͋͒̓̐͆̌́͂̎̇̋͂͛͊͛̈́̋̋̽̉͒̃͊̃̐͆̍́͊̒̆̉͆́̾̔̒̿͗̈͛͑̀̒͂͂̈̄̉̑͆͛͌͋̔̌̄́̌̇̅͋͋̊̀͑̿̅͊̆̂̊̿̃͊͋̈́́̀̃͛͒̒̈́͋̉̑͆͗͒̔̅̈́̿̂̏̑̽̅̍̅̑͊̾̈̔̐̍̀̽̉̇̒́̓̔̍̽̈́̿̈̎̀͌͛̏̍̍̌̂̔̉̕̕̕̚̚̕͘̕͜͝͝͠͠͝͝͠͠͠͝͝͠͝͝͝ͅȩ̴̛̛̛̛̛̛̛̛̪̭̘̥̤͙̖͍̍̅̀́̔̂͋̈́̈͛̓̍̓̐̊̂͐͂̃̊͆͂̀̇͊͐̔͛̏̏͗́̿̿̏͑̈́́̄̑͒͆͋̿́̊̇͋́̈́̀̾̇̽̀͒͋͒̔̒̏͂́̑͌̽̇̂̈̇̀͌̒̀̒̅̊̌̉͒͌̐͛́͆͗̄͆̃̈́͛̓̽͗͊̐̀͑͊̇́̌͒̌̀̿̽̀́̈̈̓͑̒̓̓͂͂̈̔͂̋̐̇͛̒̏̐̾̒͒͒͆̓̆͐̎̿̍̑̂̀̀̽͛͌̏͂̔̉̎͑͆͊̈́́̐́̇͌͆͂͌͗͛̒̉͊̆̒̊̓̒̇́̂̀̌͐͌͑̊̂̂̋͌͌̽͗͊̀̒̂̈́͊͐͛̀̓̓͊́͛̈́͑̓̾͒̉͋̏̔̎̈́͐͂͊̂͗̈́͒̈́̉͆͌̏͗̇͘͘̚͘͘͘̕̕̕͘̕̚̕͘̚̚̚̚͝͝͝͝͠͝͠͠͠͠͝͝͠͠ ̸̢̡̨̢̡̨̡̧̨̡̧̡̡̡̧̨̛̛̛̛̛̛̙̮̣͚̦̞̗̹̪̪̲̜̟̱̼̻̝͍̬͙̻̣͇̤̺̳̮̟͍̪͉̻̠͉̣͍̤͍̮̭͔̪̖̪̜̗͚̩̹̤͍̻̰̜̘̭̙͎̖̞̖͙͉͙̗͍̰̜͖̥̭̞͙̮̪̫͉̺̟̲̮̲͓̜̪̬̬͎͕̩̦̘͓͎̠̱͍̖͍̝͉̯͎̟̝̳͕̪͚̖̤͎͈̥͇̱̘̲̼̮̮͔̗̟͇̲͓͇͉̪̗̬̖̰̩͙́̏̎̄̃͒̋̓͌̂͒̑̒̑͌̀͊̓͐͊̈́̿͆́̌̐́̇̃̂̇̓̆͗̇͊̐̄̀̏̐̿̂̅̉̈̑͆̓̾̀́̂͐̄̈́̀̒̃̍͒͌̇̀̋̈́́̆́́̅͑̒̿͐͂̎̐̈̽̔̉̀̀͑̌̂̿̊͑̊̓̑̏́̈̾̈̒̓̀͐̀̋̀̒͋́́̌̃̈̎̅̆͗̏̀̀́̈́̒̈͆͆̈́̅͌̓̽̃̍͑̆̊̎̓̀̄͋̐̂̊̑̀̃͌̄̊͊̀̾̌̀̇̆̉͒̅̉̑̉̊͗͐̌̃̑͒̓̇́͊͘̚̕͘̚̕͘̚͘̕̚̚͜͜͜͜͠͝͠͝͝͝͠͝͠͝͝t̵̢̢̨̡̧̡̢̨̡̧̢̧̡̨̨̡̨̨̢̢̨̡̢̢̨̢̨̛̛̛̛̛͈͓͔͔͈̤͚̞̫̻̰̯̻̮̖̮̣̙͙̭̲͓̹͉̮͔̲͙̺͚̹͓͈̺̥̹̰͙̰̥̳̻͓̝͇̗̳̱͇͚̘̼̦̰͇̳̤̳̯̹̬͖̫̱̮̤̺̼̠͇̞̝̞̯̖̲͖̘̫̭͔̝̜̝͈̭͔̜̥͙̼͕̭̖̮̪̮̘͖̦̟͔͕͍̟̳͎̥̮̮̬̗͖̳̤̯̙̘͖͍͙̫̳͕̯̥̰͍̞̺͓̲̲͕̩̘͈͇͍̪̤͔̠͓̩̦̥͕̟̻̘̘̞͈͚̝͔̜͔̲͓̮̯͚͓͎̪̯̹͇̪̞͓̻͔͇̩̲̙̩̜̰̲͎͎͓̬̳̣̦̟̲̙̬̺̠̻͉̼̹͍̥͓͎̖̪̼͕̥͇̬̣̦͓̙̰̲̝̜̜̖̫͓̬̮̹͍̘̱̭̲̲͎̱͙̙͒̂̐̃̎̉̀͊̄́͌̈́̄̿̈͋͗̌̈́͛̊͆̂͑̑͐͛̍͗͂͒̆̒̒͂̔̏̎̿͛̒͐̄͑́̾̊͆̃̐̓̈́̈̃̀̒̿̓̈̊̌͋̃̑̈́̓̈́̑̉̌̓́̀͗̃̓͛̐̽̈́̊̂̎̄̋̈͋̒͆̅͌̓̅͊͊̿̑͒͑̈́̌̔̀͑̾̍̽͌̀̌̆͊̄̓̂͗͑͐̿͛͂̈́̔̑̋̀́̀̔́̈̎͒͒̎͐̎̓̈̒̔̆̓͆̿̐̉͛͛̀́̅͆̌̈̏̃̉͆̃̃͒̑̋̈́̍̿̿͊̆͑̅̓̎̂̓̑͗̊̓̂̈̂̈́̇̓̉̌̆̽̍̀̒̽̎̈̎̽̽͆̔̓͐̃͌̉̅͌̌̚͘͘͘̚͘̚̕̕͘̚͘͘̕̚͘͘̚̕̕͜͜͜͜͝͝͝͠͝͝͝͠͠͝͠͠͝͝͝͝ͅͅͅͅͅͅơ̸̢̡̡̧̢̧̨̡̢̧̨̡̡̡̧̡̨̧̨̡̡̢̛̛̛̛̝̗̗̱̹̮͓͇̯̘͙̪̹̼͔̻̤̫̟̻͉͉̩͓̲̩͓͕͓̟̱̟̣̺̩̻̝̘̠̟̙̘̝̤̬̙͕̫͉̘̱̠̖̱͔̺̮̮͍̙̰̥̥̲̼̼̞̞̦̲̹̤̮̹͙̭͙̣̭̝̠͉̟͉̝̹̭̪̫͚̣̭̹̟͇͓͎̜̙̪͕͔͍̲̲̬̥͙͉̠̣̪̳̹̙̳͎̰͎̮̰͕͓̯̹͓̱͇̣̳̪̹͈̪̞͇͕̦̲̘͙̠̬̪̭̰̖͈̭̝̬̻̗̮̬̼͙͙̗̰̣͉̙̗͔̥̻̙͖̟͚͎̭̝̮̘̪̥̪̘͉͎̯̹̮͍̝̣̻͈͍̦̏̀̈́͊͗͌̃̿͊͌́̑̈́̿̽̈́̃̅͂̏̌̃̓͒͌̏͆̇͌̆͗̈́̒̈́̈́͆̈́͒͋̾̄̐̈́̌̅̋͑͛̇̅̎̓̔͒̍̔̆̀̓͌͒̽̏͑͆̈́̍̈́͆̈́͋̓̈́̋̄͋͌̔̂̽̀͊͗̍͛͛̈́̈́̍̈́̆̋͆͗̅̀̓͛̿̏́̅̑̑̈̏̑͊̿̈̑͋̋̀̏̽̃͒̋̀̀̍̂̈̿̽̾̒͒̊̑̒͐́͒͊͆̍͌̓͆̓͛̓̕͘͘̕͘̚͘̚͜͜͜͜͜͝͝͝͝͠͝͝͠͝͠͝͠͝͝͠͠͝ͅͅͅͅͅ)
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I think limiting unicode to printable characters is a good compromise, i'll relax it to allow unicode in addition to ascii
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Ok, i've spent some time to cleanup/standardize this, see
replace problematic unicode characters with U+FFFD instead of deleting them, following RFC 9839 guidance that deletion is a security risk. moves sanitization to version.go and adds comprehensive tests. refs: https://www.rfc-editor.org/rfc/rfc9839.html refs: libp2p/specs#491
Shows the AgentVersion from libp2p identify protocol below successful connections. The agent string is sanitized to ASCII-only and limited to 64 characters for clean terminal output.
The goal is to bring visibility into software versions that successfully host the data.
Demo