Added command ipfs object get [hash]

This will display the formatted data of a MerkleDag (links and data)
This commit is contained in:
jmjatlanta 2016-12-22 10:21:18 -05:00
parent 7fa0fc6a7b
commit da4b1f86f4
6 changed files with 132 additions and 27 deletions

View file

@ -70,3 +70,71 @@ int ipfs_exporter_to_file(const unsigned char* hash, const char* file_name, cons
return 1;
}
/**
* get a file by its hash, and write the data to a file
* @param hash the base58 multihash of the cid
* @param file_name the file name to write to
* @returns true(1) on success
*/
int ipfs_exporter_to_console(const unsigned char* hash, const struct FSRepo* fs_repo) {
// convert hash to cid
struct Cid* cid = NULL;
if ( ipfs_cid_decode_hash_from_base58(hash, strlen((char*)hash), &cid) == 0) {
return 0;
}
// find block
struct Node* read_node = NULL;
if (ipfs_merkledag_get(cid->hash, cid->hash_length, &read_node, fs_repo) == 0) {
ipfs_cid_free(cid);
return 0;
}
// no longer need the cid
ipfs_cid_free(cid);
// process blocks
struct NodeLink* link = read_node->head_link;
printf("Links:[");
while (link != NULL) {
unsigned char b58[100];
ipfs_cid_hash_to_base58(link->hash, link->hash_size, b58, 100);
printf("{\"Name\":\"%s\",\"Hash\":\"%s\",\"Size\":%lu}", (link->name != NULL ? link->name : ""), (char*)b58, link->t_size);
link = link->next;
}
printf("],\"Data\":\"");
for(size_t i = 0LU; i < read_node->data_size; i++) {
printf("%02x", read_node->data[i]);
}
printf("\"}\n");
if (read_node != NULL)
ipfs_node_free(read_node);
return 1;
}
/***
* Called from the command line with ipfs object get [hash]. Retrieves the object pointed to by hash, and displays its block data (links and data elements)
* @param argc number of arguments
* @param argv arguments
* @returns true(1) on success
*/
int ipfs_exporter_object_get(int argc, char** argv) {
struct FSRepo* fs_repo = NULL;
// open the repo
int retVal = ipfs_repo_fsrepo_new(NULL, NULL, &fs_repo);
if (retVal == 0) {
return 0;
}
retVal = ipfs_repo_fsrepo_open(fs_repo);
if (retVal == 0) {
return 0;
}
// find hash
retVal = ipfs_exporter_to_console((unsigned char*)argv[3], fs_repo);
return retVal;
}

View file

@ -1,8 +1,11 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ipfs/importer/importer.h"
#include "ipfs/merkledag/merkledag.h"
#include "ipfs/repo/fsrepo/fs_repo.h"
#include "ipfs/unixfs/unixfs.h"
#define MAX_DATA_SIZE 262144 // 1024 * 256;
@ -16,14 +19,11 @@
* @param node the node to add to
* @returns number of bytes read
*/
size_t ipfs_import_chunk(FILE* file, struct Node* node, struct FSRepo* fs_repo) {
size_t ipfs_import_chunk(FILE* file, struct Node* parent_node, struct FSRepo* fs_repo, size_t* total_size) {
unsigned char buffer[MAX_DATA_SIZE];
size_t bytes_read = fread(buffer, 1, MAX_DATA_SIZE, file);
if (node->data_size == 0) {
ipfs_node_set_data(node, buffer, bytes_read);
} else {
// create a new node, and link to the parent
// create a new node
struct Node* new_node = NULL;
ipfs_node_new_from_data(buffer, bytes_read, &new_node);
// persist
@ -31,12 +31,36 @@ size_t ipfs_import_chunk(FILE* file, struct Node* node, struct FSRepo* fs_repo)
// put link in parent node
struct NodeLink* new_link = NULL;
ipfs_node_link_create("", new_node->hash, new_node->hash_size, &new_link);
ipfs_node_add_link(node, new_link);
new_link->t_size = new_node->data_size;
*total_size += new_link->t_size;
ipfs_node_add_link(parent_node, new_link);
ipfs_node_free(new_node);
}
// save the parent_node if it is time...
if (bytes_read != MAX_DATA_SIZE) {
// build UnixFS for file
struct UnixFS* unix_fs;
if (ipfs_unixfs_new(&unix_fs) == 0) {
return 0;
}
unix_fs->data_type = UNIXFS_FILE;
unix_fs->file_size = *total_size;
// now encode unixfs and put in parent_node->data
size_t temp_size = ipfs_unixfs_protobuf_encode_size(unix_fs);
unsigned char temp[temp_size];
size_t bytes_written;
if (ipfs_unixfs_protobuf_encode(unix_fs, temp, temp_size, &bytes_written) == 0) {
ipfs_unixfs_free(unix_fs);
return 0;
}
parent_node->data_size = bytes_written;
parent_node->data = (unsigned char*)malloc(bytes_written);
if (parent_node->data == NULL) {
ipfs_unixfs_free(unix_fs);
return 0;
}
memcpy(parent_node->data, temp, bytes_written);
// persist the main node
ipfs_merkledag_add(node, fs_repo);
ipfs_merkledag_add(parent_node, fs_repo);
}
return bytes_read;
}
@ -44,21 +68,22 @@ size_t ipfs_import_chunk(FILE* file, struct Node* node, struct FSRepo* fs_repo)
/**
* Creates a node based on an incoming file
* @param file_name the file to import
* @param node the root node (could have links to others)
* @param parent_node the root node (has links to others)
* @returns true(1) on success
*/
int ipfs_import_file(const char* fileName, struct Node** node, struct FSRepo* fs_repo) {
int ipfs_import_file(const char* fileName, struct Node** parent_node, struct FSRepo* fs_repo) {
int retVal = 1;
int bytes_read = MAX_DATA_SIZE;
size_t total_size = 0;
FILE* file = fopen(fileName, "rb");
retVal = ipfs_node_new(node);
retVal = ipfs_node_new(parent_node);
if (retVal == 0)
return 0;
// add all nodes
while ( bytes_read == MAX_DATA_SIZE) {
bytes_read = ipfs_import_chunk(file, *node, fs_repo);
bytes_read = ipfs_import_chunk(file, *parent_node, fs_repo, &total_size);
}
fclose(file);
@ -76,7 +101,7 @@ int ipfs_import(int argc, char** argv) {
* param 1: add
* param 2: filename
*/
struct Node* node = NULL;
struct Node* directory_node = NULL;
struct FSRepo* fs_repo = NULL;
// open the repo
@ -87,20 +112,20 @@ int ipfs_import(int argc, char** argv) {
retVal = ipfs_repo_fsrepo_open(fs_repo);
// import the file(s)
retVal = ipfs_import_file(argv[2], &node, fs_repo);
retVal = ipfs_import_file(argv[2], &directory_node, fs_repo);
// give some results to the user
int buffer_len = 100;
unsigned char buffer[buffer_len];
retVal = ipfs_cid_hash_to_base58(node->hash, node->hash_size, buffer, buffer_len);
retVal = ipfs_cid_hash_to_base58(directory_node->hash, directory_node->hash_size, buffer, buffer_len);
if (retVal == 0) {
printf("Unable to generate hash\n");
return 0;
}
printf("added %s %s\n", buffer, argv[2]);
if (node != NULL)
ipfs_node_free(node);
if (directory_node != NULL)
ipfs_node_free(directory_node);
if (fs_repo != NULL)
ipfs_repo_fsrepo_free(fs_repo);

View file

@ -7,3 +7,6 @@
* @returns true(1) on success
*/
int ipfs_exporter_to_file(const unsigned char* hash, const char* file_name, const struct FSRepo* fs_repo);
int ipfs_exporter_object_get(int argc, char** argv);

BIN
main/ipfs

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View file

@ -3,6 +3,7 @@
#include "ipfs/repo/init.h"
#include "ipfs/importer/importer.h"
#include "ipfs/importer/exporter.h"
void stripit(int argc, char** argv) {
char tmp[strlen(argv[argc])];
@ -22,6 +23,7 @@ void strip_quotes(int argc, char** argv) {
#define INIT 1
#define ADD 2
#define OBJECT_GET 3
/***
* Basic parsing of command line arguments to figure out where the user wants to go
@ -37,6 +39,9 @@ int parse_arguments(int argc, char** argv) {
if (strcmp("add", argv[1]) == 0) {
return ADD;
}
if (strcmp("object", argv[1]) == 0 && argc > 2 && strcmp("get", argv[2]) == 0) {
return OBJECT_GET;
}
return -1;
}
@ -53,5 +58,8 @@ int main(int argc, char** argv) {
case (ADD):
ipfs_import(argc, argv);
break;
case (OBJECT_GET):
ipfs_exporter_object_get(argc, argv);
break;
}
}

View file

@ -42,8 +42,9 @@ int ipfs_merkledag_add(struct Node* node, struct FSRepo* fs_repo) {
}
/***
* Retrieves a node from the datastore based on the cid
* @param cid the key to look for
* Retrieves a node from the datastore based on the hash
* @param hash the key to look for
* @param hash_size the length of the key
* @param node the node to be created
* @param fs_repo the repository
* @returns true(1) on success