implement yang-patch
This commit is contained in:
Alan Yaniger
parent
e0ee365958
commit
8d2fbf39de
12 changed files with 562 additions and 5 deletions
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@ -74,6 +74,7 @@
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#include "restconf_api.h"
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#include "restconf_err.h"
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#include "restconf_methods.h"
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#include "restconf_methods_post.h"
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/*! REST OPTIONS method
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* According to restconf
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@ -579,6 +580,536 @@ api_data_write(clicon_handle h,
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return retval;
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} /* api_data_write */
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#ifdef YANG_PATCH
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/*! YANG PATCH method
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* @param[in] h Clixon handle
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* @param[in] req Generic Www handle
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* @param[in] api_path0 According to restconf (Sec 3.5.3.1 in rfc8040)
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* @param[in] pcvec Vector of path ie DOCUMENT_URI element
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* @param[in] pi Offset, where to start pcvec
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* @param[in] qvec Vector of query string (QUERY_STRING)
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* @param[in] data Stream input data
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* @param[in] pretty Set to 1 for pretty-printed xml/json output
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* @param[in] media_out Output media
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* Netconf: <edit-config> (nc:operation="merge")
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* See RFC8072
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* YANG patch can be used to "create", "delete", "insert", "merge", "move", "replace", and/or
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"remove" a resource within the target resource.
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* Currently "move" not supported
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*/
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static int
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api_data_yang_patch(clicon_handle h,
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void *req,
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char *api_path0,
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cvec *pcvec,
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int pi,
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cvec *qvec,
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char *data,
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int pretty,
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restconf_media media_out,
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ietf_ds_t ds)
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{
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int retval = -1;
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int i;
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cxobj *xdata0 = NULL; /* Original -d data struct (including top symbol) */
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cbuf *cbx = NULL;
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cxobj *xtop = NULL; /* top of api-path */
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cxobj *xbot = NULL; /* bottom of api-path */
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yang_stmt *ybot = NULL; /* yang of xbot */
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cxobj *xbot_tmp = NULL;
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yang_stmt *yspec;
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char *api_path;
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cxobj *xret = NULL;
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cxobj *xretcom = NULL; /* return from commit */
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cxobj *xretdis = NULL; /* return from discard-changes */
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cxobj *xerr = NULL; /* malloced must be freed */
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int ret;
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cvec *nsc = NULL;
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yang_bind yb;
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char *xpath = NULL;
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const int temp_str_malloc_size = 5000;
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char *path_orig_1 = NULL;
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clicon_debug(1, "%s api_path:\"%s\"", __FUNCTION__, api_path0);
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if ((yspec = clicon_dbspec_yang(h)) == NULL){
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clicon_err(OE_FATAL, 0, "No DB_SPEC");
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goto done;
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}
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api_path=api_path0;
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/* strip /... from start */
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for (i=0; i<pi; i++)
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api_path = index(api_path+1, '/');
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/* Translate yang-patch path to xpath: xpath (cbpath) and namespace context (nsc) */
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char yang_patch_path[] = "/ietf-yang-patch:yang-patch";
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if ((ret = api_path2xpath(yang_patch_path, yspec, &xpath, &nsc, &xerr)) < 0)
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goto done;
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if (ret == 0){ /* validation failed */
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if (api_return_err0(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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/* Create config top-of-tree */
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if ((xtop = xml_new(NETCONF_INPUT_CONFIG, NULL, CX_ELMNT)) == NULL)
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goto done;
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/* Translate yang-patch path to xml in the form of xtop/xbot */
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xbot = xtop;
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if ((ret = api_path2xml(yang_patch_path, yspec, xtop, YC_DATANODE, 1, &xbot, &ybot, &xerr)) < 0)
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goto done;
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if (ret == 0){ /* validation failed */
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if (api_return_err(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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yb = YB_MODULE;
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if ((ret = clixon_json_parse_string(data, yb, yspec, &xbot, &xerr)) < 0){
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if (netconf_malformed_message_xml(&xerr, clicon_err_reason) < 0)
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goto done;
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if (api_return_err0(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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if (ret == 0){
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if (api_return_err0(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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/*
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* RFC 8072 2.1: The message-body MUST identify exactly one resource instance
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*/
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int nrchildren0 = 0;
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cxobj *x = NULL;
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if (xml_child_nr_type(xbot, CX_ELMNT) - nrchildren0 != 1){
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if (netconf_malformed_message_xml(&xerr, "The message-body MUST contain exactly one instance of the expected data resource") < 0)
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goto done;
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if (api_return_err0(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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size_t veclen;
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cxobj **vec = NULL;
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while ((x = xml_child_each(xbot, x, CX_ELMNT)) != NULL){
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ret = xpath_vec(x, nsc, "edit", &vec, &veclen);
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if (xml_flag(x, XML_FLAG_MARK)){
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xml_flag_reset(x, XML_FLAG_MARK);
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continue;
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}
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}
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path_orig_1 = malloc(temp_str_malloc_size);
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if (path_orig_1 == NULL) {
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goto done;
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} else {
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strcpy(path_orig_1, restconf_uripath(h));
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}
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// Loop through the edits
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for (int i = 0; i < veclen; i++) {
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cxobj *xn = vec[i];
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// Get target
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char *target_val = NULL;
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cxobj **target_vec = NULL;
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size_t target_veclen;
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ret = xpath_vec(xn, nsc, "target", &target_vec, &target_veclen);
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if (ret < 0) {
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goto done;
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}
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for (int j = 0; j < target_veclen; j++) {
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cxobj *target_xn = target_vec[j];
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target_val = xml_body(target_xn);
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}
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// Get operation
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char *op_val = NULL;
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cxobj **operation_vec = NULL;
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size_t operation_veclen;
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ret = xpath_vec(xn, nsc, "operation", &operation_vec, &operation_veclen);
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if (ret < 0) {
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goto done;
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}
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for (int j = 0; j < operation_veclen; j++) {
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cxobj *operation_xn = operation_vec[j];
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op_val = xml_body(operation_xn);
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}
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// Get "point" and "where" for insert operations
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char *point_val = NULL;
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cxobj **point_vec = NULL;
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size_t point_veclen;
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if (strcmp(op_val, "insert") == 0) {
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ret = xpath_vec(xn, nsc, "point", &point_vec, &point_veclen);
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if (ret < 0) {
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goto done;
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}
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for (int j = 0; j < point_veclen; j++) {
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cxobj *point_xn = point_vec[j];
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point_val = xml_body(point_xn);
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}
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}
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char *where_val = NULL;
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cxobj **where_vec = NULL;
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size_t where_veclen;
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if (strcmp(op_val, "insert") == 0) {
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ret = xpath_vec(xn, nsc, "where", &where_vec, &where_veclen);
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if (ret < 0) {
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goto done;
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}
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for (int j = 0; j < where_veclen; j++) {
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cxobj *where_xn = where_vec[j];
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where_val = xml_body(where_xn);
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}
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}
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// Construct request URI
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char* simple_patch_request_uri = NULL;
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simple_patch_request_uri = malloc(temp_str_malloc_size);
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strcpy(simple_patch_request_uri, path_orig_1);
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int plain_patch_val = 0;
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char* api_path_target = NULL;
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api_path_target = malloc(temp_str_malloc_size);
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strcpy(api_path_target, api_path);
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if (strcmp(op_val, "merge") == 0) {
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plain_patch_val = 1;
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strcat(api_path_target, target_val);
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strcat(simple_patch_request_uri, target_val);
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}
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if (xerr)
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xml_free(xerr);
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if ((xtop = xml_new(NETCONF_INPUT_CONFIG, NULL, CX_ELMNT)) == NULL)
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goto done;
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// Get key field
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/* Translate api_path to xml in the form of xtop/xbot */
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xbot_tmp = xtop;
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if ((ret = api_path2xml(api_path_target, yspec, xtop, YC_DATANODE, 1, &xbot_tmp, &ybot, &xerr)) < 0)
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goto done;
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if (ret == 0){ /* validation failed */
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if (api_return_err0(h, req, xerr, pretty, media_out, 0) < 0)
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goto done;
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goto ok;
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}
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char *key_node_id = xml_name(xbot_tmp);
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char *path = NULL;
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if ((path = restconf_param_get(h, "REQUEST_URI")) != NULL){
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for (int i1 = 0; i1 <pi; i1++)
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path = index(path+1, '/');
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}
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const char colon[2] = ":";
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char *modname = strtok(&(path[1]), colon);
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cxobj **key_vec = NULL;
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key_vec = xml_childvec_get(xbot_tmp);
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cxobj *key_xn = NULL;
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if (key_vec != NULL) {
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key_xn = key_vec[0];
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}
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// Get values (for "delete", there are no values)
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cxobj **values_vec = NULL;
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size_t values_veclen;
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xpath_vec(xn, nsc, "value", &values_vec, &values_veclen);
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key_node_id = NULL;
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// Loop through the values
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for (int j = 0; j < values_veclen; j++) {
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cxobj *values_xn = values_vec[j];
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cxobj** values_child_vec = xml_childvec_get(values_xn);
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if (key_node_id == NULL)
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key_node_id = xml_name(*values_child_vec);
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char *patch_header = NULL;
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patch_header = malloc(temp_str_malloc_size);
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if (patch_header == NULL) {
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goto done;
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}
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strcpy(patch_header, modname);
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strcat(patch_header, ":");
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strcat(patch_header, key_node_id);
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cxobj *x_simple_patch = xml_new(patch_header, NULL, CX_ELMNT);
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if (x_simple_patch == NULL)
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goto done;
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int value_vec_len = xml_child_nr(*values_child_vec);
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cxobj** value_vec = xml_childvec_get(*values_child_vec);
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cxobj * value_vec_tmp = NULL;
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// For "replace", delete the item and then POST it
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// TODO - in an ordered list, insert it into its original position
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if (strcmp(op_val,"replace") == 0) {
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char *delete_req_uri = malloc(temp_str_malloc_size);
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if (delete_req_uri == NULL)
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break;
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strcpy(delete_req_uri, simple_patch_request_uri);
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strcat(delete_req_uri, target_val);
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// Delete the object with the old values
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ret = api_data_delete(h, req, delete_req_uri, pi, pretty, YANG_DATA_JSON, ds );
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free(delete_req_uri);
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// Now insert the object with the new values
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char *json_simple_patch = malloc(temp_str_malloc_size);
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if (json_simple_patch == NULL)
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goto done;
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memset(json_simple_patch, 0, temp_str_malloc_size);
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for (int k = 0; k < value_vec_len; k++) {
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if (value_vec[k] != NULL) {
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value_vec_tmp = xml_dup(value_vec[k]);
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xml_addsub(x_simple_patch, value_vec_tmp);
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}
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}
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cbuf* cb = cbuf_new();
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xml2json_cbuf(cb, x_simple_patch, 1);
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// Some ugly text processing to get the JSON to match what api_data_post() expects
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char *json_simple_patch_tmp = cbuf_get(cb);
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int brace_count = 0;
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for (int l = 0; l < strlen(json_simple_patch_tmp); l++) {
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char c = json_simple_patch_tmp[l];
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if (c == '{') {
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brace_count++;
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if (brace_count == 2) {
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json_simple_patch[strlen(json_simple_patch)] = '[';
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}
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}
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json_simple_patch[strlen(json_simple_patch)] = c;
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}
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/* strip /... from end */
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char *post_req_uri = malloc(temp_str_malloc_size);
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if (post_req_uri == NULL)
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break;
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memset(post_req_uri, 0, temp_str_malloc_size);
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if (post_req_uri == NULL)
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break;
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int idx = strlen(target_val);
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for (int l = strlen(target_val); l>= 0; l--) {
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if (target_val[l] == '/') {
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idx = l;
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break;
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}
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}
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strncpy(post_req_uri, target_val, idx);
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strcat(simple_patch_request_uri, post_req_uri);
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free(post_req_uri);
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for (int l = strlen(json_simple_patch); l>= 0; l--) {
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char c = json_simple_patch[l];
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if (c == '}') {
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json_simple_patch[l] = ']';
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json_simple_patch[l + 1] = '}';
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break;
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}
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}
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// Send the POST request
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ret = api_data_post(h, req, simple_patch_request_uri, pi, qvec, json_simple_patch, pretty, YANG_DATA_JSON, media_out, ds );
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if (value_vec_tmp != NULL)
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free(value_vec_tmp);
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free(x_simple_patch);
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free(patch_header); // NULL check was already done before
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if (ret != 0)
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goto done;
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break;
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}
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// For "create", put all the data values into a single POST request
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if (strcmp(op_val,"create") == 0) {
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for (int k = 0; k < value_vec_len; k++) {
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if (value_vec[k] != NULL) {
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value_vec_tmp = xml_dup(value_vec[k]);
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xml_addsub(x_simple_patch, value_vec_tmp);
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}
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}
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// Send the POST request
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cbuf* cb = cbuf_new();
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xml2json_cbuf(cb, x_simple_patch, 1);
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char *json_simple_patch = cbuf_get(cb);
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ret = api_data_post(h, req, simple_patch_request_uri, pi, qvec, json_simple_patch, pretty, YANG_DATA_JSON, media_out, ds );
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if (value_vec_tmp != NULL)
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free(value_vec_tmp);
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free(x_simple_patch);
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free(patch_header); // NULL check was already done before
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if (ret != 0)
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goto done;
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break;
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}
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// For "insert", make a api_data_post request
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if (strcmp(op_val, "insert") == 0) {
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char *json_simple_patch = malloc(temp_str_malloc_size);
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if (json_simple_patch == NULL)
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goto done;
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memset(json_simple_patch, 0, temp_str_malloc_size);
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// Loop through the XML, and get each value
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for (int k = 0; k < value_vec_len; k++) {
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if (value_vec[k] != NULL) {
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value_vec_tmp = xml_dup(value_vec[k]);
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xml_addsub(x_simple_patch, value_vec_tmp);
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}
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}
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cbuf* cb = cbuf_new();
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xml2json_cbuf(cb, x_simple_patch, 1);
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// Some ugly text processing to get the JSON to match what api_data_post() expects
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char *json_simple_patch_tmp = cbuf_get(cb);
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int brace_count = 0;
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for (int l = 0; l < strlen(json_simple_patch_tmp); l++) {
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char c = json_simple_patch_tmp[l];
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if (c == '{') {
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brace_count++;
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if (brace_count == 2) {
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json_simple_patch[strlen(json_simple_patch)] = '[';
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}
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}
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json_simple_patch[strlen(json_simple_patch)] = c;
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}
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for (int l = strlen(json_simple_patch); l>= 0; l--) {
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char c = json_simple_patch[l];
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if (c == '}') {
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json_simple_patch[l] = ']';
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json_simple_patch[l + 1] = '}';
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break;
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}
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}
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// Set the insert attributes
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cvec* qvec_tmp = NULL;
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qvec_tmp = cvec_new(0);
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if (qvec_tmp == NULL)
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goto done;
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cg_var *cv;
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if ((cv = cvec_add(qvec_tmp, CGV_STRING)) == NULL){
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goto done;
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}
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cv_name_set(cv, "insert");
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cv_string_set(cv, where_val);
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char *point_str = malloc(temp_str_malloc_size);
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if (point_str == NULL)
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goto done;
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memset(point_str, 0, temp_str_malloc_size);
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strcpy(point_str, api_path);
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strcat(point_str, point_val);
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if ((cv = cvec_add(qvec_tmp, CGV_STRING)) == NULL){
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goto done;
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}
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cv_name_set(cv, "point");
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||||
cv_string_set(cv, point_str);
|
||||
|
||||
// Send the POST request
|
||||
ret = api_data_post(h, req, simple_patch_request_uri, pi, qvec_tmp, json_simple_patch, pretty, YANG_DATA_JSON, media_out, ds );
|
||||
if (cb != NULL)
|
||||
cbuf_free(cb);
|
||||
if (value_vec_tmp != NULL)
|
||||
free(value_vec_tmp);
|
||||
free(point_str); // NULL check was already done above
|
||||
free(json_simple_patch); // NULL check was already done above
|
||||
free(patch_header); // NULL check was already done before
|
||||
if (x_simple_patch != NULL)
|
||||
free(x_simple_patch);
|
||||
break;
|
||||
}
|
||||
|
||||
// For merge", make single simple patch requests for each value
|
||||
if (strcmp(op_val,"merge") == 0) {
|
||||
if (key_xn != NULL)
|
||||
xml_addsub(x_simple_patch, key_xn);
|
||||
|
||||
char *json_simple_patch = malloc(temp_str_malloc_size);
|
||||
if (json_simple_patch == NULL)
|
||||
goto done;
|
||||
|
||||
// Loop through the XML, create JSON from each one, and submit a simple patch
|
||||
for (int k = 0; k < value_vec_len; k++) {
|
||||
if (value_vec[k] != NULL) {
|
||||
value_vec_tmp = xml_dup(value_vec[k]);
|
||||
xml_addsub(x_simple_patch, value_vec_tmp);
|
||||
}
|
||||
cbuf* cb = cbuf_new();
|
||||
xml2json_cbuf(cb, x_simple_patch, 1);
|
||||
|
||||
// Some ugly text processing to get the JSON to match what api_data_write() expects for a simple patch
|
||||
char *json_simple_patch_tmp = cbuf_get(cb);
|
||||
memset(json_simple_patch, 0, temp_str_malloc_size);
|
||||
int brace_count = 0;
|
||||
for (int l = 0; l < strlen(json_simple_patch_tmp); l++) {
|
||||
char c = json_simple_patch_tmp[l];
|
||||
if (c == '{') {
|
||||
brace_count++;
|
||||
if (brace_count == 2) {
|
||||
json_simple_patch[strlen(json_simple_patch)] = '[';
|
||||
}
|
||||
}
|
||||
json_simple_patch[strlen(json_simple_patch)] = c;
|
||||
}
|
||||
for (int l = strlen(json_simple_patch); l>= 0; l--) {
|
||||
char c = json_simple_patch[l];
|
||||
if (c == '}') {
|
||||
json_simple_patch[l] = ']';
|
||||
json_simple_patch[l + 1] = '}';
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (value_vec_tmp != NULL)
|
||||
free(value_vec_tmp);
|
||||
// Send the simple patch request
|
||||
ret = api_data_write(h, req, simple_patch_request_uri, pcvec, pi, qvec, json_simple_patch, pretty, YANG_DATA_JSON, media_out, plain_patch_val, ds );
|
||||
cbuf_free(cb);
|
||||
}
|
||||
free(json_simple_patch); // NULL check was already done above
|
||||
free(patch_header); // NULL check was already done before
|
||||
if (x_simple_patch != NULL)
|
||||
free(x_simple_patch);
|
||||
}
|
||||
}
|
||||
if ((strcmp(op_val, "delete") == 0) ||
|
||||
(strcmp(op_val, "remove") == 0)) {
|
||||
strcat(simple_patch_request_uri, target_val);
|
||||
if (strcmp(op_val, "delete") == 0) {
|
||||
// TODO - send error
|
||||
} else {
|
||||
// TODO - do not send error
|
||||
}
|
||||
api_data_delete(h, req, simple_patch_request_uri, pi, pretty, YANG_DATA_JSON, ds);
|
||||
}
|
||||
if (simple_patch_request_uri)
|
||||
free(simple_patch_request_uri);
|
||||
if (api_path_target)
|
||||
free(api_path_target);
|
||||
}
|
||||
ok:
|
||||
retval = 0;
|
||||
done:
|
||||
if (path_orig_1 != NULL)
|
||||
free(path_orig_1);
|
||||
if (vec)
|
||||
free(vec);
|
||||
if (xpath)
|
||||
free(xpath);
|
||||
if (nsc)
|
||||
xml_nsctx_free(nsc);
|
||||
if (xret)
|
||||
xml_free(xret);
|
||||
if (xerr)
|
||||
xml_free(xerr);
|
||||
if (xretcom)
|
||||
xml_free(xretcom);
|
||||
if (xretdis)
|
||||
xml_free(xretdis);
|
||||
if (xtop)
|
||||
xml_free(xtop);
|
||||
if (xdata0)
|
||||
xml_free(xdata0);
|
||||
if (cbx)
|
||||
cbuf_free(cbx);
|
||||
return retval;
|
||||
}
|
||||
#endif // YANG_PATCH
|
||||
|
||||
/*! Generic REST PUT method
|
||||
* @param[in] h Clixon handle
|
||||
* @param[in] req Generic Www handle
|
||||
|
|
@ -673,9 +1204,16 @@ api_data_patch(clicon_handle h,
|
|||
media_in, media_out, 1, ds);
|
||||
break;
|
||||
case YANG_PATCH_XML:
|
||||
case YANG_PATCH_JSON: /* RFC 8072 patch */
|
||||
ret = restconf_notimplemented(h, req, pretty, media_out);
|
||||
break;
|
||||
case YANG_PATCH_JSON: /* RFC 8072 patch */
|
||||
#ifdef YANG_PATCH
|
||||
ret = api_data_yang_patch(h, req, api_path0, pcvec, pi, qvec, data, pretty,
|
||||
media_out, ds);
|
||||
#else
|
||||
ret = restconf_unsupported_media(h, req, pretty, media_out);
|
||||
#endif
|
||||
break;
|
||||
default:
|
||||
ret = restconf_unsupported_media(h, req, pretty, media_out);
|
||||
break;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue