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Implement s3:// protocol (#11511)

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For those that want to pull from s3

Signed-off-by: Eric Curtin <ecurtin@redhat.com>
This commit is contained in:
Eric Curtin 2025-02-01 11:30:54 +01:00 committed by GitHub
parent 5bbc7362cb
commit ecef206ccb
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1 changed files with 43 additions and 0 deletions
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43
examples/run/run.cpp
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@ -65,6 +65,13 @@ static int printe(const char * fmt, ...) {
return ret;
}
static std::string strftime_fmt(const char * fmt, const std::tm & tm) {
std::ostringstream oss;
oss << std::put_time(&tm, fmt);
return oss.str();
}
class Opt {
public:
int init(int argc, const char ** argv) {
@ -698,6 +705,39 @@ class LlamaData {
return download(url, bn, true);
}
int s3_dl(const std::string & model, const std::string & bn) {
const size_t slash_pos = model.find('/');
if (slash_pos == std::string::npos) {
return 1;
}
const std::string bucket = model.substr(0, slash_pos);
const std::string key = model.substr(slash_pos + 1);
const char * access_key = std::getenv("AWS_ACCESS_KEY_ID");
const char * secret_key = std::getenv("AWS_SECRET_ACCESS_KEY");
if (!access_key || !secret_key) {
printe("AWS credentials not found in environment\n");
return 1;
}
// Generate AWS Signature Version 4 headers
// (Implementation requires HMAC-SHA256 and date handling)
// Get current timestamp
const time_t now = time(nullptr);
const tm tm = *gmtime(&now);
const std::string date = strftime_fmt("%Y%m%d", tm);
const std::string datetime = strftime_fmt("%Y%m%dT%H%M%SZ", tm);
const std::vector<std::string> headers = {
"Authorization: AWS4-HMAC-SHA256 Credential=" + std::string(access_key) + "/" + date +
"/us-east-1/s3/aws4_request",
"x-amz-content-sha256: UNSIGNED-PAYLOAD", "x-amz-date: " + datetime
};
const std::string url = "https://" + bucket + ".s3.amazonaws.com/" + key;
return download(url, bn, true, headers);
}
std::string basename(const std::string & path) {
const size_t pos = path.find_last_of("/\\");
if (pos == std::string::npos) {
@ -738,6 +778,9 @@ class LlamaData {
rm_until_substring(model_, "github:");
rm_until_substring(model_, "://");
ret = github_dl(model_, bn);
} else if (string_starts_with(model_, "s3://")) {
rm_until_substring(model_, "://");
ret = s3_dl(model_, bn);
} else { // ollama:// or nothing
rm_until_substring(model_, "ollama.com/library/");
rm_until_substring(model_, "://");