Browse Source
This patch adds three similar and related programs. http-pull downloads objects from an HTTP server; rpull downloads objects by using ssh and rpush on the other side; and rpush uploads objects by using ssh and rpull on the other side. The algorithm should be sufficient to make the network throughput required depend only on how much content is new, not at all on how much content the repository contains. The combination should enable people to have remote repositories by way of ssh login for authenticated users and HTTP for anonymous access. Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>maint
Daniel Barkalow
20 years ago
committed by
Linus Torvalds
6 changed files with 482 additions and 2 deletions
@ -0,0 +1,204 @@
@@ -0,0 +1,204 @@
|
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include "cache.h" |
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#include "commit.h" |
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#include <errno.h> |
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#include <stdio.h> |
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#include <curl/curl.h> |
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#include <curl/easy.h> |
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static CURL *curl; |
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static char *base; |
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static int tree = 0; |
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static int commits = 0; |
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static int all = 0; |
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static SHA_CTX c; |
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static z_stream stream; |
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static int local; |
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static int zret; |
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static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, |
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void *data) { |
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char expn[4096]; |
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size_t size = eltsize * nmemb; |
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int posn = 0; |
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do { |
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ssize_t retval = write(local, ptr + posn, size - posn); |
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if (retval < 0) |
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return posn; |
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posn += retval; |
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} while (posn < size); |
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stream.avail_in = size; |
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stream.next_in = ptr; |
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do { |
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stream.next_out = expn; |
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stream.avail_out = sizeof(expn); |
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zret = inflate(&stream, Z_SYNC_FLUSH); |
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SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out); |
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} while (stream.avail_in && zret == Z_OK); |
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return size; |
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} |
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static int fetch(unsigned char *sha1) |
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{ |
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char *hex = sha1_to_hex(sha1); |
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char *filename = sha1_file_name(sha1); |
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char real_sha1[20]; |
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char *url; |
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char *posn; |
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if (has_sha1_file(sha1)) { |
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return 0; |
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} |
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local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666); |
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if (local < 0) |
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return error("Couldn't open %s\n", filename); |
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memset(&stream, 0, sizeof(stream)); |
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inflateInit(&stream); |
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SHA1_Init(&c); |
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curl_easy_setopt(curl, CURLOPT_FILE, NULL); |
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); |
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url = malloc(strlen(base) + 50); |
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strcpy(url, base); |
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posn = url + strlen(base); |
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strcpy(posn, "objects/"); |
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posn += 8; |
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memcpy(posn, hex, 2); |
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posn += 2; |
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*(posn++) = '/'; |
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strcpy(posn, hex + 2); |
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curl_easy_setopt(curl, CURLOPT_URL, url); |
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/*printf("Getting %s\n", hex);*/ |
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if (curl_easy_perform(curl)) |
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return error("Couldn't get %s for %s\n", url, hex); |
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close(local); |
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inflateEnd(&stream); |
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SHA1_Final(real_sha1, &c); |
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if (zret != Z_STREAM_END) { |
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unlink(filename); |
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return error("File %s (%s) corrupt\n", hex, url); |
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} |
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if (memcmp(sha1, real_sha1, 20)) { |
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unlink(filename); |
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return error("File %s has bad hash\n", hex); |
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} |
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return 0; |
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} |
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static int process_tree(unsigned char *sha1) |
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{ |
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struct tree *tree = lookup_tree(sha1); |
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struct tree_entry_list *entries; |
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if (parse_tree(tree)) |
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return -1; |
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for (entries = tree->entries; entries; entries = entries->next) { |
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if (fetch(entries->item.tree->object.sha1)) |
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return -1; |
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if (entries->directory) { |
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if (process_tree(entries->item.tree->object.sha1)) |
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return -1; |
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} |
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} |
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return 0; |
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} |
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static int process_commit(unsigned char *sha1) |
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{ |
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struct commit *obj = lookup_commit(sha1); |
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if (fetch(sha1)) |
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return -1; |
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if (parse_commit(obj)) |
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return -1; |
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if (tree) { |
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if (fetch(obj->tree->object.sha1)) |
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return -1; |
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if (process_tree(obj->tree->object.sha1)) |
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return -1; |
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if (!all) |
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tree = 0; |
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} |
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if (commits) { |
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struct commit_list *parents = obj->parents; |
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for (; parents; parents = parents->next) { |
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if (has_sha1_file(parents->item->object.sha1)) |
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continue; |
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if (fetch(parents->item->object.sha1)) { |
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/* The server might not have it, and |
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* we don't mind. |
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*/ |
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continue; |
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} |
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if (process_commit(parents->item->object.sha1)) |
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return -1; |
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} |
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} |
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return 0; |
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} |
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int main(int argc, char **argv) |
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{ |
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char *commit_id; |
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char *url; |
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int arg = 1; |
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unsigned char sha1[20]; |
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while (arg < argc && argv[arg][0] == '-') { |
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if (argv[arg][1] == 't') { |
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tree = 1; |
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} else if (argv[arg][1] == 'c') { |
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commits = 1; |
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} else if (argv[arg][1] == 'a') { |
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all = 1; |
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tree = 1; |
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commits = 1; |
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} |
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arg++; |
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} |
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if (argc < arg + 2) { |
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usage("http-pull [-c] [-t] [-a] commit-id url"); |
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return 1; |
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} |
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commit_id = argv[arg]; |
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url = argv[arg + 1]; |
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get_sha1_hex(commit_id, sha1); |
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curl_global_init(CURL_GLOBAL_ALL); |
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curl = curl_easy_init(); |
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base = url; |
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if (fetch(sha1)) |
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return 1; |
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if (process_commit(sha1)) |
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return 1; |
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curl_global_cleanup(); |
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return 0; |
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} |
@ -0,0 +1,128 @@
@@ -0,0 +1,128 @@
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include "cache.h" |
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#include "commit.h" |
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#include <errno.h> |
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#include <stdio.h> |
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#include "rsh.h" |
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static int tree = 0; |
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static int commits = 0; |
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static int all = 0; |
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static int fd_in; |
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static int fd_out; |
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static int fetch(unsigned char *sha1) |
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{ |
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if (has_sha1_file(sha1)) |
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return 0; |
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write(fd_out, sha1, 20); |
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return write_sha1_from_fd(sha1, fd_in); |
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} |
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static int process_tree(unsigned char *sha1) |
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{ |
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struct tree *tree = lookup_tree(sha1); |
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struct tree_entry_list *entries; |
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if (parse_tree(tree)) |
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return -1; |
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for (entries = tree->entries; entries; entries = entries->next) { |
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/* |
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fprintf(stderr, "Tree %s ", sha1_to_hex(sha1)); |
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fprintf(stderr, "needs %s\n", |
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sha1_to_hex(entries->item.tree->object.sha1)); |
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*/ |
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if (fetch(entries->item.tree->object.sha1)) { |
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return error("Missing item %s", |
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sha1_to_hex(entries->item.tree->object.sha1)); |
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} |
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if (entries->directory) { |
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if (process_tree(entries->item.tree->object.sha1)) |
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return -1; |
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} |
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} |
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return 0; |
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} |
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static int process_commit(unsigned char *sha1) |
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{ |
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struct commit *obj = lookup_commit(sha1); |
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if (fetch(sha1)) { |
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return error("Fetching %s", sha1_to_hex(sha1)); |
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} |
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if (parse_commit(obj)) |
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return -1; |
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if (tree) { |
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if (fetch(obj->tree->object.sha1)) |
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return -1; |
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if (process_tree(obj->tree->object.sha1)) |
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return -1; |
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if (!all) |
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tree = 0; |
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} |
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if (commits) { |
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struct commit_list *parents = obj->parents; |
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for (; parents; parents = parents->next) { |
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if (has_sha1_file(parents->item->object.sha1)) |
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continue; |
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if (fetch(parents->item->object.sha1)) { |
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/* The server might not have it, and |
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* we don't mind. |
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*/ |
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error("Missing tree %s; continuing", |
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sha1_to_hex(parents->item->object.sha1)); |
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continue; |
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} |
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if (process_commit(parents->item->object.sha1)) |
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return -1; |
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} |
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} |
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return 0; |
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} |
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int main(int argc, char **argv) |
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{ |
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char *commit_id; |
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char *url; |
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int arg = 1; |
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unsigned char sha1[20]; |
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while (arg < argc && argv[arg][0] == '-') { |
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if (argv[arg][1] == 't') { |
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tree = 1; |
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} else if (argv[arg][1] == 'c') { |
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commits = 1; |
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} else if (argv[arg][1] == 'a') { |
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all = 1; |
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tree = 1; |
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commits = 1; |
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} |
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arg++; |
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} |
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if (argc < arg + 2) { |
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usage("rpull [-c] [-t] [-a] commit-id url"); |
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return 1; |
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} |
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commit_id = argv[arg]; |
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url = argv[arg + 1]; |
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if (setup_connection(&fd_in, &fd_out, "rpush", url, arg, argv + 1)) |
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return 1; |
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get_sha1_hex(commit_id, sha1); |
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if (fetch(sha1)) |
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return 1; |
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if (process_commit(sha1)) |
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return 1; |
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return 0; |
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} |
@ -0,0 +1,69 @@
@@ -0,0 +1,69 @@
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#include "cache.h" |
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#include "rsh.h" |
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#include <sys/socket.h> |
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#include <errno.h> |
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void service(int fd_in, int fd_out) { |
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ssize_t size; |
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int posn; |
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char sha1[20]; |
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unsigned long objsize; |
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void *buf; |
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do { |
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posn = 0; |
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do { |
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size = read(fd_in, sha1 + posn, 20 - posn); |
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if (size < 0) { |
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perror("rpush: read "); |
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return; |
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} |
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if (!size) |
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return; |
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posn += size; |
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} while (posn < 20); |
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/* fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1)); */ |
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buf = map_sha1_file(sha1, &objsize); |
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if (!buf) { |
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fprintf(stderr, "rpush: could not find %s\n", |
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sha1_to_hex(sha1)); |
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return; |
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} |
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posn = 0; |
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do { |
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size = write(fd_out, buf + posn, objsize - posn); |
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if (size <= 0) { |
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if (!size) { |
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fprintf(stderr, "rpush: write closed"); |
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} else { |
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perror("rpush: write "); |
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} |
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return; |
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} |
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posn += size; |
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} while (posn < objsize); |
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} while (1); |
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} |
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int main(int argc, char **argv) |
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{ |
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int arg = 1; |
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char *commit_id; |
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char *url; |
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int fd_in, fd_out; |
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while (arg < argc && argv[arg][0] == '-') { |
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arg++; |
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} |
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if (argc < arg + 2) { |
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usage("rpush [-c] [-t] [-a] commit-id url"); |
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return 1; |
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} |
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commit_id = argv[arg]; |
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url = argv[arg + 1]; |
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if (setup_connection(&fd_in, &fd_out, "rpull", url, arg, argv + 1)) |
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return 1; |
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service(fd_in, fd_out); |
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return 0; |
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} |
@ -0,0 +1,63 @@
@@ -0,0 +1,63 @@
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#include "rsh.h" |
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#include <string.h> |
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#include <sys/socket.h> |
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#include "cache.h" |
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#define COMMAND_SIZE 4096 |
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int setup_connection(int *fd_in, int *fd_out, char *remote_prog, |
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char *url, int rmt_argc, char **rmt_argv) |
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{ |
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char *host; |
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char *path; |
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int sv[2]; |
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char command[COMMAND_SIZE]; |
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char *posn; |
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int i; |
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if (!strcmp(url, "-")) { |
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*fd_in = 0; |
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*fd_out = 1; |
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return 0; |
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} |
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host = strstr(url, "//"); |
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if (!host) { |
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return error("Bad URL: %s", url); |
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} |
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host += 2; |
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path = strchr(host, '/'); |
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if (!path) { |
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return error("Bad URL: %s", url); |
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} |
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*(path++) = '\0'; |
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/* ssh <host> 'cd /<path>; stdio-pull <arg...> <commit-id>' */ |
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snprintf(command, COMMAND_SIZE, |
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"cd /%s; SHA1_FILE_DIRECTORY=objects %s", |
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path, remote_prog); |
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posn = command + strlen(command); |
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for (i = 0; i < rmt_argc; i++) { |
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*(posn++) = ' '; |
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strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command)); |
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posn += strlen(rmt_argv[i]); |
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if (posn - command + 4 >= COMMAND_SIZE) { |
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return error("Command line too long"); |
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} |
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} |
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strcpy(posn, " -"); |
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if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv)) { |
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return error("Couldn't create socket"); |
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} |
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if (!fork()) { |
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close(sv[1]); |
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dup2(sv[0], 0); |
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dup2(sv[0], 1); |
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execlp("ssh", "ssh", host, command, NULL); |
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} |
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close(sv[0]); |
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*fd_in = sv[1]; |
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*fd_out = sv[1]; |
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return 0; |
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} |
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